IPv4 (English Wikipedia)

Asia-Pacific Network Information Centre (15 April 2011). "APNIC IPv4 Address Pool Reaches Final /8". Archived from the original on 7 August 2011. Retrieved 15 April 2011.

cisco.com (Global: 5,047^th place; English: 3,553^rd place)

"Understanding and Configuring the ip unnumbered Command". Cisco. Retrieved 2021-11-25.

doi.org (Global: 2^nd place; English: 2^nd place)

M. Cotton; L. Vegoda; B. Haberman (April 2013). R. Bonica (ed.). Special-Purpose IP Address Registries. Internet Engineering Task Force. doi:10.17487/RFC6890. ISSN 2070-1721. BCP 153. RFC 6890. Best Current Practice 153. Obsoletes RFC 4773, 5156, 5735 and 5736. Updated by RFC 8190.
S. Deering; R. Hinden (December 1998). Internet Protocol, Version 6 (IPv6) Specification. Network Working Group. doi:10.17487/RFC2460. RFC 2460. Obsolete. Obsoleted by RFC 8200. Obsoletes RFC 1883. Updated by RFC 5095, 5722, 5871, 6437, 6564, 6935, 6946, 7045 and 7112.
R. Fink; R. Hinden (March 2004). 6bone (IPv6 Testing Address Allocation) Phaseout. Network Working Group. doi:10.17487/RFC3701. RFC 3701. Informational. Obsoletes RFC 2471.
Y. Rekhter; B. Moskowitz; D. Karrenberg; G. J. de Groot; E. Lear (February 1996). Address Allocation for Private Internets. Network Working Group. doi:10.17487/RFC1918. BCP 5. RFC 1918. Best Current Practice 5. Obsoletes RFC 1627 and 1597. Updated by RFC 6761.
J. Weil; V. Kuarsingh; C. Donley; C. Liljenstolpe; M. Azinger (April 2012). IANA-Reserved IPv4 Prefix for Shared Address Space. Internet Engineering Task Force. doi:10.17487/RFC6598. ISSN 2070-1721. BCP 153. RFC 6598. Best Current Practice 153. Updates RFC 5735.
S. Cheshire; B. Aboba; E. Guttman (May 2005). Dynamic Configuration of IPv4 Link-Local Addresses. Network Working Group. doi:10.17487/RFC3927. RFC 3927. Proposed Standard.
J. Arkko; M. Cotton; L. Vegoda (January 2010). IPv4 Address Blocks Reserved for Documentation. Internet Engineering Task Force. doi:10.17487/RFC5737. ISSN 2070-1721. RFC 5737. Informational. Updates RFC 1166.
O. Troan (May 2015). B. Carpenter (ed.). Deprecating the Anycast Prefix for 6to4 Relay Routers. Internet Engineering Task Force. doi:10.17487/RFC7526. BCP 196. RFC 7526. Best Current Practice 196. Obsoletes RFC 3068 and 6732.
C. Huitema (June 2001). An Anycast Prefix for 6to4 Relay Routers. Network Working Group. doi:10.17487/RFC3068. RFC 3068. Informational. Obsoleted by RFC 7526.
S. Bradner; J. McQuaid (March 1999). Benchmarking Methodology for Network Interconnect Devices. Network Working Group. doi:10.17487/RFC2544. RFC 2544. Informational. Updated by: RFC 6201 and RFC 6815.
M. Cotton; L. Vegoda; D. Meyer (March 2010). IANA Guidelines for IPv4 Multicast Address Assignments. IETF. doi:10.17487/RFC5771. ISSN 2070-1721. BCP 51. RFC 5771. Best Current Practice 51. Obsoletes RFC 3138 and 3171. Updates RFC 2780.
S. Venaas; R. Parekh; G. Van de Velde; T. Chown; M. Eubanks (August 2012). Multicast Addresses for Documentation. Internet Engineering Task Force. doi:10.17487/RFC6676. ISSN 2070-1721. RFC 6676. Informational.
J. Reynolds, ed. (January 2002). Assigned Numbers: RFC 1700 is Replaced by an On-line Database. Network Working Group. doi:10.17487/RFC3232. RFC 3232. Informational. Obsoletes RFC 1700.
C. Byrne; T-Mobile US (August 2014). IPv4 Service Continuity Prefix. Internet Engineering Task Force. doi:10.17487/RFC7335. ISSN 2070-1721. RFC 7335. Proposed Standard.
T. Savolainen; J. Korhonen; D. Wing (November 2013). Discovery of the IPv6 Prefix Used for IPv6 Address Synthesis. Internet Engineering Task Force. doi:10.17487/RFC7050. ISSN 2070-1721. RFC 7050. Proposed Standard. Updated by RFC 8880.
J. Abley; B. Dickson; W. Kumari; G. Michaelson (May 2015). AS112 Redirection Using DNAME. Internet Engineering Task Force. doi:10.17487/RFC7535. ISSN 2070-1721. RFC 7535. Informational.
R. Braden, ed. (October 1989). Requirements for Internet Hosts -- Communication Layers. Network Working Group. doi:10.17487/RFC1122. STD 3. RFC 1122. Internet Standard 3. Updated by RFC 1349, 4379, 5884, 6093, 6298, 6633, 6864, 8029 and 9293. IP addresses are not permitted to have the value 0 or -1 for any of the <Host-number>, <Network-number>, or <Subnet-number> fields (except in [special cases]).
J. Reynolds; J. Postel (October 1984). ASSIGNED NUMBERS. Network Working Group. doi:10.17487/RFC0923. RFC 923. Obsolete. Obsoleted by RFC 943. Obsoletes RFC 900. Special Addresses: In certain contexts, it is useful to have fixed addresses with functional significance rather than as identifiers of specific hosts. When such usage is called for, the address zero is to be interpreted as meaning "this", as in "this network".
R. Braden, ed. (October 1989). Requirements for Internet Hosts -- Communication Layers. Network Working Group. doi:10.17487/RFC1122. STD 3. RFC 1122. Internet Standard 3. Updated by RFC 1349, 4379, 5884, 6093, 6298, 6633, 6864, 8029 and 9293.
A. Retana; R. White; V. Fuller; D. McPherson (December 2000). Using 31-Bit Prefixes on IPv4 Point-to-Point Links. Network Working Group. doi:10.17487/RFC3021. RFC 3021. Proposed Standard.
P. Almquist (November 1994). F. Kastenholz (ed.). Towards Requirements for IP Routers. Network Working Group. doi:10.17487/RFC1716. RFC 1716. Obsolete. Obsoleted by RFC 1812.
F. Baker, ed. (June 1995). Requirements for IP Version 4 Routers. Network Working Group. doi:10.17487/RFC1812. RFC 1812. Proposed Standard. Obsoletes RFC 1716 and 1009. Updated by RFC 2644 and 6633.
C. Partridge; F. Kastenholz (December 1994). Technical Criteria for Choosing IP The Next Generation (IPng). Network Working Group. doi:10.17487/RFC1726. RFC 1726. Informational.
J. Postel, ed. (September 1981). INTERNET PROTOCOL - DARPA INTERNET PROGRAM PROTOCOL SPECIFICATION. IETF. doi:10.17487/RFC0791. STD 5. RFC 791. IEN 128, 123, 111, 80, 54, 44, 41, 28, 26. Internet Standard 5. Obsoletes RFC 760. Updated by RFC 1349, 2474 and 6864.
K. Nichols; S. Blake; F. Baker; D. Black (December 1998). Definition of the Differentiated Services Field (DS Field) in the IPv4 and IPv6 Headers. Network Working Group. doi:10.17487/RFC2474. RFC 2474. Proposed Standard. Obsoletes RFC 1455 and 1349. Updated by RFC 3168, 3260 and 8436.
K. Ramakrishnan; S. Floyd; D. Black (September 2001). The Addition of Explicit Congestion Notification (ECN) to IP. Network Working Group. doi:10.17487/RFC3168. RFC 3168. Proposed Standard. Obsoletes RFC 2481. Updates RFC 2474, 2401 and 793. Updated by RFC 4301, 6040 and 8311.
Savage, Stefan (2000). "Practical network support for IP traceback". ACM SIGCOMM Computer Communication Review. 30 (4): 295–306. doi:10.1145/347057.347560.
J. Touch (February 2013). Updated Specification of the IPv4 ID Field. Internet Engineering Task Force. doi:10.17487/RFC6864. ISSN 2070-1721. RFC 6864. Proposed Standard. Updates RFC 791, 1122 and 2003.
S. Bellovin (1 April 2003). The Security Flag in the IPv4 Header. Network Working Group. doi:10.17487/RFC3514. RFC 3514. Informational. This is an April Fools' Day Request for Comments.
J. Postel, ed. (September 1981). INTERNET PROTOCOL - DARPA INTERNET PROGRAM PROTOCOL SPECIFICATION. IETF. doi:10.17487/RFC0791. STD 5. RFC 791. IEN 128, 123, 111, 80, 54, 44, 41, 28, 26. Internet Standard 5. sec. 3.1, p. 14. Obsoletes RFC 760. Updated by RFC 1349, 2474 and 6864.
F. Gont (July 2011). Security Assessment of the Internet Protocol Version 4. Internet Engineering Task Force. doi:10.17487/RFC6274. ISSN 2070-1721. RFC 6274. Informational.

faqs.org (Global: 7,483^rd place; English: 6,774^th place)

"Cisco unofficial FAQ". Retrieved 2012-05-10.

google.com (Global: 109^th place; English: 87^th place)

"Statistics - IPv6 - Google". Google. Retrieved 2026-07-30.
"IPv6 – Google". www.google.com. Retrieved 2022-01-28.

iana.org (Global: 2,479^th place; English: 2,606^th place)

"IPv4 Special-Purpose Address Space". www.iana.org. IANA. Retrieved 2026-06-21.

ietf.org (Global: 731^st place; English: 625^th place)

datatracker.ietf.org

Almquist, Philip; Kastenholz, Frank (December 1993). "Towards Requirements for IP Routers". Internet Engineering Task Force.

inquirer.net (Global: 348^th place; English: 163^rd place)

technology.inquirer.net

"World 'running out of Internet addresses'". Archived from the original on 2011-01-25. Retrieved 2011-01-23.

ipv4marketgroup.com (Global: low place; English: low place)

"A Brief History of IPv4". IPv4 Market Group. Retrieved 2020-08-19.

ipwithease.com (Global: low place; English: low place)

Bhardwaj, Rashmi (2020-06-04). "Fragment Offset - IP With Ease". ipwithease.com. Retrieved 2022-11-21.

nanog.org (Global: low place; English: low place)

mailman.nanog.org

ICANN, nanog mailing list. "Five /8s allocated to RIRs – no unallocated IPv4 unicast /8s remain".

nro.net (Global: low place; English: low place)

Smith, Lucie; Lipner, Ian (3 February 2011). "Free Pool of IPv4 Address Space Depleted". Number Resource Organization. Retrieved 3 February 2011.

nytimes.com (Global: 7^th place; English: 7^th place)

archive.nytimes.com

Davis, Lidija (February 21, 2009). "Vint Cerf - We Still Have 80 Per Cent of the World to Connect". The New York Times. Retrieved 2024-05-10.

rfc-editor.org (Global: 747^th place; English: 325^th place)

M. Cotton; L. Vegoda; B. Haberman (April 2013). R. Bonica (ed.). Special-Purpose IP Address Registries. Internet Engineering Task Force. doi:10.17487/RFC6890. ISSN 2070-1721. BCP 153. RFC 6890. Best Current Practice 153. Obsoletes RFC 4773, 5156, 5735 and 5736. Updated by RFC 8190.
S. Deering; R. Hinden (December 1998). Internet Protocol, Version 6 (IPv6) Specification. Network Working Group. doi:10.17487/RFC2460. RFC 2460. Obsolete. Obsoleted by RFC 8200. Obsoletes RFC 1883. Updated by RFC 5095, 5722, 5871, 6437, 6564, 6935, 6946, 7045 and 7112.
R. Fink; R. Hinden (March 2004). 6bone (IPv6 Testing Address Allocation) Phaseout. Network Working Group. doi:10.17487/RFC3701. RFC 3701. Informational. Obsoletes RFC 2471.
Y. Rekhter; B. Moskowitz; D. Karrenberg; G. J. de Groot; E. Lear (February 1996). Address Allocation for Private Internets. Network Working Group. doi:10.17487/RFC1918. BCP 5. RFC 1918. Best Current Practice 5. Obsoletes RFC 1627 and 1597. Updated by RFC 6761.
J. Weil; V. Kuarsingh; C. Donley; C. Liljenstolpe; M. Azinger (April 2012). IANA-Reserved IPv4 Prefix for Shared Address Space. Internet Engineering Task Force. doi:10.17487/RFC6598. ISSN 2070-1721. BCP 153. RFC 6598. Best Current Practice 153. Updates RFC 5735.
S. Cheshire; B. Aboba; E. Guttman (May 2005). Dynamic Configuration of IPv4 Link-Local Addresses. Network Working Group. doi:10.17487/RFC3927. RFC 3927. Proposed Standard.
J. Arkko; M. Cotton; L. Vegoda (January 2010). IPv4 Address Blocks Reserved for Documentation. Internet Engineering Task Force. doi:10.17487/RFC5737. ISSN 2070-1721. RFC 5737. Informational. Updates RFC 1166.
O. Troan (May 2015). B. Carpenter (ed.). Deprecating the Anycast Prefix for 6to4 Relay Routers. Internet Engineering Task Force. doi:10.17487/RFC7526. BCP 196. RFC 7526. Best Current Practice 196. Obsoletes RFC 3068 and 6732.
C. Huitema (June 2001). An Anycast Prefix for 6to4 Relay Routers. Network Working Group. doi:10.17487/RFC3068. RFC 3068. Informational. Obsoleted by RFC 7526.
S. Bradner; J. McQuaid (March 1999). Benchmarking Methodology for Network Interconnect Devices. Network Working Group. doi:10.17487/RFC2544. RFC 2544. Informational. Updated by: RFC 6201 and RFC 6815.
M. Cotton; L. Vegoda; D. Meyer (March 2010). IANA Guidelines for IPv4 Multicast Address Assignments. IETF. doi:10.17487/RFC5771. ISSN 2070-1721. BCP 51. RFC 5771. Best Current Practice 51. Obsoletes RFC 3138 and 3171. Updates RFC 2780.
S. Venaas; R. Parekh; G. Van de Velde; T. Chown; M. Eubanks (August 2012). Multicast Addresses for Documentation. Internet Engineering Task Force. doi:10.17487/RFC6676. ISSN 2070-1721. RFC 6676. Informational.
J. Reynolds, ed. (January 2002). Assigned Numbers: RFC 1700 is Replaced by an On-line Database. Network Working Group. doi:10.17487/RFC3232. RFC 3232. Informational. Obsoletes RFC 1700.
C. Byrne; T-Mobile US (August 2014). IPv4 Service Continuity Prefix. Internet Engineering Task Force. doi:10.17487/RFC7335. ISSN 2070-1721. RFC 7335. Proposed Standard.
T. Savolainen; J. Korhonen; D. Wing (November 2013). Discovery of the IPv6 Prefix Used for IPv6 Address Synthesis. Internet Engineering Task Force. doi:10.17487/RFC7050. ISSN 2070-1721. RFC 7050. Proposed Standard. Updated by RFC 8880.
J. Abley; B. Dickson; W. Kumari; G. Michaelson (May 2015). AS112 Redirection Using DNAME. Internet Engineering Task Force. doi:10.17487/RFC7535. ISSN 2070-1721. RFC 7535. Informational.
R. Braden, ed. (October 1989). Requirements for Internet Hosts -- Communication Layers. Network Working Group. doi:10.17487/RFC1122. STD 3. RFC 1122. Internet Standard 3. Updated by RFC 1349, 4379, 5884, 6093, 6298, 6633, 6864, 8029 and 9293. IP addresses are not permitted to have the value 0 or -1 for any of the <Host-number>, <Network-number>, or <Subnet-number> fields (except in [special cases]).
J. Reynolds; J. Postel (October 1984). ASSIGNED NUMBERS. Network Working Group. doi:10.17487/RFC0923. RFC 923. Obsolete. Obsoleted by RFC 943. Obsoletes RFC 900. Special Addresses: In certain contexts, it is useful to have fixed addresses with functional significance rather than as identifiers of specific hosts. When such usage is called for, the address zero is to be interpreted as meaning "this", as in "this network".
R. Braden, ed. (October 1989). Requirements for Internet Hosts -- Communication Layers. Network Working Group. doi:10.17487/RFC1122. STD 3. RFC 1122. Internet Standard 3. Updated by RFC 1349, 4379, 5884, 6093, 6298, 6633, 6864, 8029 and 9293.
A. Retana; R. White; V. Fuller; D. McPherson (December 2000). Using 31-Bit Prefixes on IPv4 Point-to-Point Links. Network Working Group. doi:10.17487/RFC3021. RFC 3021. Proposed Standard.
P. Almquist (November 1994). F. Kastenholz (ed.). Towards Requirements for IP Routers. Network Working Group. doi:10.17487/RFC1716. RFC 1716. Obsolete. Obsoleted by RFC 1812.
F. Baker, ed. (June 1995). Requirements for IP Version 4 Routers. Network Working Group. doi:10.17487/RFC1812. RFC 1812. Proposed Standard. Obsoletes RFC 1716 and 1009. Updated by RFC 2644 and 6633.
C. Partridge; F. Kastenholz (December 1994). Technical Criteria for Choosing IP The Next Generation (IPng). Network Working Group. doi:10.17487/RFC1726. RFC 1726. Informational.
J. Postel, ed. (September 1981). INTERNET PROTOCOL - DARPA INTERNET PROGRAM PROTOCOL SPECIFICATION. IETF. doi:10.17487/RFC0791. STD 5. RFC 791. IEN 128, 123, 111, 80, 54, 44, 41, 28, 26. Internet Standard 5. Obsoletes RFC 760. Updated by RFC 1349, 2474 and 6864.
K. Nichols; S. Blake; F. Baker; D. Black (December 1998). Definition of the Differentiated Services Field (DS Field) in the IPv4 and IPv6 Headers. Network Working Group. doi:10.17487/RFC2474. RFC 2474. Proposed Standard. Obsoletes RFC 1455 and 1349. Updated by RFC 3168, 3260 and 8436.
K. Ramakrishnan; S. Floyd; D. Black (September 2001). The Addition of Explicit Congestion Notification (ECN) to IP. Network Working Group. doi:10.17487/RFC3168. RFC 3168. Proposed Standard. Obsoletes RFC 2481. Updates RFC 2474, 2401 and 793. Updated by RFC 4301, 6040 and 8311.
J. Touch (February 2013). Updated Specification of the IPv4 ID Field. Internet Engineering Task Force. doi:10.17487/RFC6864. ISSN 2070-1721. RFC 6864. Proposed Standard. Updates RFC 791, 1122 and 2003.
S. Bellovin (1 April 2003). The Security Flag in the IPv4 Header. Network Working Group. doi:10.17487/RFC3514. RFC 3514. Informational. This is an April Fools' Day Request for Comments.
J. Postel, ed. (September 1981). INTERNET PROTOCOL - DARPA INTERNET PROGRAM PROTOCOL SPECIFICATION. IETF. doi:10.17487/RFC0791. STD 5. RFC 791. IEN 128, 123, 111, 80, 54, 44, 41, 28, 26. Internet Standard 5. sec. 3.1, p. 14. Obsoletes RFC 760. Updated by RFC 1349, 2474 and 6864.
F. Gont (July 2011). Security Assessment of the Internet Protocol Version 4. Internet Engineering Task Force. doi:10.17487/RFC6274. ISSN 2070-1721. RFC 6274. Informational.

ripe.net (Global: low place; English: low place)

labs.ripe.net

https://labs.ripe.net/author/remco-van-mook/a-farewell-to-arps-ipv4-service-on-ipv6-only-networks/. {{cite web}}: Missing or empty |title= (help)

web.archive.org (Global: 1^st place; English: 1^st place)

"World 'running out of Internet addresses'". Archived from the original on 2011-01-25. Retrieved 2011-01-23.
Asia-Pacific Network Information Centre (15 April 2011). "APNIC IPv4 Address Pool Reaches Final /8". Archived from the original on 7 August 2011. Retrieved 15 April 2011.
"Understanding IP Addressing: Everything You Ever Wanted To Know" (PDF). 3Com. Archived from the original (PDF) on June 16, 2001.

worldcat.org (Global: 4^th place; English: 4^th place)

search.worldcat.org

M. Cotton; L. Vegoda; B. Haberman (April 2013). R. Bonica (ed.). Special-Purpose IP Address Registries. Internet Engineering Task Force. doi:10.17487/RFC6890. ISSN 2070-1721. BCP 153. RFC 6890. Best Current Practice 153. Obsoletes RFC 4773, 5156, 5735 and 5736. Updated by RFC 8190.
2016 IEEE International Conference on Emerging Technologies and Innovative Business Practices for the Transformation of Societies (EmergiTech). Piscataway, NJ: University of Technology, Mauritius, Institute of Electrical and Electronics Engineers. August 2016. ISBN 9781509007066. OCLC 972636788.
J. Weil; V. Kuarsingh; C. Donley; C. Liljenstolpe; M. Azinger (April 2012). IANA-Reserved IPv4 Prefix for Shared Address Space. Internet Engineering Task Force. doi:10.17487/RFC6598. ISSN 2070-1721. BCP 153. RFC 6598. Best Current Practice 153. Updates RFC 5735.
J. Arkko; M. Cotton; L. Vegoda (January 2010). IPv4 Address Blocks Reserved for Documentation. Internet Engineering Task Force. doi:10.17487/RFC5737. ISSN 2070-1721. RFC 5737. Informational. Updates RFC 1166.
M. Cotton; L. Vegoda; D. Meyer (March 2010). IANA Guidelines for IPv4 Multicast Address Assignments. IETF. doi:10.17487/RFC5771. ISSN 2070-1721. BCP 51. RFC 5771. Best Current Practice 51. Obsoletes RFC 3138 and 3171. Updates RFC 2780.
S. Venaas; R. Parekh; G. Van de Velde; T. Chown; M. Eubanks (August 2012). Multicast Addresses for Documentation. Internet Engineering Task Force. doi:10.17487/RFC6676. ISSN 2070-1721. RFC 6676. Informational.
C. Byrne; T-Mobile US (August 2014). IPv4 Service Continuity Prefix. Internet Engineering Task Force. doi:10.17487/RFC7335. ISSN 2070-1721. RFC 7335. Proposed Standard.
T. Savolainen; J. Korhonen; D. Wing (November 2013). Discovery of the IPv6 Prefix Used for IPv6 Address Synthesis. Internet Engineering Task Force. doi:10.17487/RFC7050. ISSN 2070-1721. RFC 7050. Proposed Standard. Updated by RFC 8880.
J. Abley; B. Dickson; W. Kumari; G. Michaelson (May 2015). AS112 Redirection Using DNAME. Internet Engineering Task Force. doi:10.17487/RFC7535. ISSN 2070-1721. RFC 7535. Informational.
J. Touch (February 2013). Updated Specification of the IPv4 ID Field. Internet Engineering Task Force. doi:10.17487/RFC6864. ISSN 2070-1721. RFC 6864. Proposed Standard. Updates RFC 791, 1122 and 2003.
F. Gont (July 2011). Security Assessment of the Internet Protocol Version 4. Internet Engineering Task Force. doi:10.17487/RFC6274. ISSN 2070-1721. RFC 6274. Informational.

IPv4 (English Wikipedia)

3com.com (Global: low place; English: low place)

apnic.net (Global: low place; English: low place)

cisco.com (Global: 5,047th place; English: 3,553rd place)

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ietf.org (Global: 731st place; English: 625th place)

datatracker.ietf.org

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technology.inquirer.net

ipv4marketgroup.com (Global: low place; English: low place)

ipwithease.com (Global: low place; English: low place)

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mailman.nanog.org

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