Toll-free telephone number (English Wikipedia)

Dang, Dan Thanh (March 9, 2004). "1-800-catchy-number- makes-a-lot-of-money". The Baltimore Sun. Archived from the original on June 17, 2020. Retrieved November 4, 2013.

bebusinessed.com

History of Toll-Free Numbers, from bebusinessed.com

bizjournals.com

Brandon, Gee (December 31, 2009). "Businesses, Sheriff's Office pitch in tonight to get drunks home". Nashville Business Journal. Archived from the original on December 9, 2013. Retrieved November 4, 2013.

books.google.com

Dept, AT & T. Bell Laboratories Technical Publication; Rey, R. F. (1983-01-01). Engineering and operations in the Bell System. AT&T Bell Laboratories. ISBN 9780932764041.
Smith, David R. (2012-12-06). Digital Transmission Systems. Springer Science & Business Media. ISBN 9781441989338.

btplc.com

BT Plc. "Events in Telecommunications History (1960)". BT Archives. BT Group. Archived from the original on 2011-07-31. Retrieved 2009-05-11.
BT Plc. "Events in Telecommunications History: 1985". BT Archives. BT Group. Archived from the original on 2011-06-10. Retrieved 2011-08-23.
"1984onwards". www.btplc.com. Archived from the original on 2011-06-10. Retrieved 2009-07-12.

communiqa.com.au

"1300 vs 1800 Numbers". Communiqa Australia. 2020-06-17. Retrieved 2020-06-17.

comreg.ie

"Numbering plan for Ireland" (PDF). ComReg Ireland.

csfcorp.com

Boysen, Vincenza (17 May 2018). "FCC opens 833 number block on Apr 22, 2017". CSF Corporation. Retrieved 2019-07-25.

dmnews.com

Hovanyetz, Scott (November 22, 2000). "Logix to Route Callers for 1-800-Taxicab". Direct Marketing News. Archived from the original on October 18, 2014. Retrieved November 4, 2013.

fasts.org

"Toll Free Calls and Telecommunications Tariffs". Phone Services. 11 September 2013. Retrieved 7 February 2014.

flowertelecom.uk

Olga, Gorvachev (27 May 2016). "What is the history of 0800 Freephone numbers?". Flower Telecom. Archived from the original on 2017-08-10. Retrieved 2017-08-10.

gizmodo.com

Fallon, Sean (2009-02-17). "TrapCall Displays Blocked Numbers on Your Caller ID". Gizmodo. Retrieved 2012-07-27.

ipo.gov.uk

trademarks.ipo.gov.uk

"BT FREEFONE 0800". Intellectual Property Office. 1 March 1996. Retrieved 26 March 2023.

itu.int

"Service Provider List". Universal International Freephone Number (UIFN). International Telecommunication Union. Archived from the original on 2017-11-22. Retrieved 2020-03-22.
"Universal International Freephone Number (UIFN)". International Telecommunication Union. Retrieved 2013-11-04.

nanpa.com

"Number Resources - NPA (Area) Codes". NANPA. Archived from the original on 2013-11-04. Retrieved 2013-11-04.

nationalnanpa.com

"Implementation of the NPA 855 for Toll Free Services" (PDF). NANPA.
"Implementation of the 844 NPA for Toll-Free Services" (PDF). NANPA. 5 August 2013. Retrieved 10 August 2017.

nytimes.com

Andrew Zipern (2001-05-14). "MediaTalk; In Los Angeles, the Hubcap as Billboard". The New York Times. Retrieved 2013-11-04.

o2.co.uk

O₂. "Free numbers". Telefónica UK Limited.{{cite web}}: CS1 maint: numeric names: authors list (link)

o2.cz

"Toll-free lines - Green Line - 800". O₂ Czech Republic. Archived from the original on 2016-03-13. Retrieved 2011-07-21.

ofca.gov.hk

"The Numbering Plan for Telecommunications Services in Hong Kong (SAR), China" (PDF). OFCA, Hong Kong. 2014.

ofcom.org.uk

"Telecoms numbering - Ofcom". Ofcom. Retrieved 14 February 2020.
"Telephone numbers for use in TV and radio drama programmes". Ofcom. 26 October 2004.

stakeholders.ofcom.org.uk

"The 0500 Number Range". Ofcom. 22 September 2016.
Ofcom (3 June 2014). "The 0500 Number Range - Decision to withdraw 0500 telephone numbers" (PDF). Retrieved 10 August 2017.

patents.google.com

Weber, Roy P. "Data base communication call processing method". US patent 4191860. Filed Jul 13, 1978. Issued Mar 4, 1980

qtel.qa

"National Toll Free 800 Service". QTel Qatar.

smartnumbers.com.au

"smartnumbers". Australian Communications & Media Authority. Retrieved 2012-04-25.
"Auctioned". Australian Communications & Media Authority. Archived from the original on 2013-01-21. Retrieved 2008-08-17.

strath.ac.uk

Some Sectoral and Locational Factors in the Development of Call Centres in the U.S. and the Netherlands Archived 2013-12-03 at the Wayback Machine, Peter Bain, University of Strathclyde, 2001

telegraph.co.uk

Murray-West, Rosie (2013-04-13). "'Freephone' numbers to be free from all phones". Telegraph (UK). Archived from the original on 2013-04-15.

web.archive.org

BT Plc. "Events in Telecommunications History (1960)". BT Archives. BT Group. Archived from the original on 2011-07-31. Retrieved 2009-05-11.
Blackburn Police Station Archived 2013-11-10 at the Wayback Machine, Westlothian UK, "dial 100 and ask for Freephone Crimebusters" to report tips about crime
Olga, Gorvachev (27 May 2016). "What is the history of 0800 Freephone numbers?". Flower Telecom. Archived from the original on 2017-08-10. Retrieved 2017-08-10.
BT Plc. "Events in Telecommunications History: 1985". BT Archives. BT Group. Archived from the original on 2011-06-10. Retrieved 2011-08-23.
Hovanyetz, Scott (November 22, 2000). "Logix to Route Callers for 1-800-Taxicab". Direct Marketing News. Archived from the original on October 18, 2014. Retrieved November 4, 2013.
Brandon, Gee (December 31, 2009). "Businesses, Sheriff's Office pitch in tonight to get drunks home". Nashville Business Journal. Archived from the original on December 9, 2013. Retrieved November 4, 2013.
Dang, Dan Thanh (March 9, 2004). "1-800-catchy-number- makes-a-lot-of-money". The Baltimore Sun. Archived from the original on June 17, 2020. Retrieved November 4, 2013.
Poulsen, Kevin (September 7, 2005). "Red Cross Gets Squatter's Number". Wired. Archived from the original on July 4, 2014. Retrieved July 1, 2013.
"Toll-free lines - Green Line - 800". O₂ Czech Republic. Archived from the original on 2016-03-13. Retrieved 2011-07-21.
"Auctioned". Australian Communications & Media Authority. Archived from the original on 2013-01-21. Retrieved 2008-08-17.
Some Sectoral and Locational Factors in the Development of Call Centres in the U.S. and the Netherlands Archived 2013-12-03 at the Wayback Machine, Peter Bain, University of Strathclyde, 2001
"1984onwards". www.btplc.com. Archived from the original on 2011-06-10. Retrieved 2009-07-12.
Murray-West, Rosie (2013-04-13). "'Freephone' numbers to be free from all phones". Telegraph (UK). Archived from the original on 2013-04-15.
"Number Resources - NPA (Area) Codes". NANPA. Archived from the original on 2013-11-04. Retrieved 2013-11-04.
"Service Provider List". Universal International Freephone Number (UIFN). International Telecommunication Union. Archived from the original on 2017-11-22. Retrieved 2020-03-22.

westlothian.gov.uk

Blackburn Police Station Archived 2013-11-10 at the Wayback Machine, Westlothian UK, "dial 100 and ask for Freephone Crimebusters" to report tips about crime

wired.com

Poulsen, Kevin (September 7, 2005). "Red Cross Gets Squatter's Number". Wired. Archived from the original on July 4, 2014. Retrieved July 1, 2013.