HTTP 451 (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "HTTP 451" in English language version.

refsWebsite

Global rank English rank

3rfc-editor.org

6,184^th place

4,465^th place

2theguardian.com

12^th place

11^th place

2web.archive.org

1^st place

1^st place

214^th place

176^th place

2^nd place

2^nd place

1attorneygeneral.gov

low place

low place

low place

8,773^rd place

1,884^th place

1,694^th place

2,053^rd place

1,340^th place

low place

6,277^th place

466^th place

349^th place

1openrightsgroup.org

low place

low place

low place

low place

175^th place

137^th place

low place

low place

8^th place

10^th place

attorneygeneral.gov (Global: low place; English: low place)

"Attorney General Shapiro, Governor Wolf, State Police Successfully Block Access to 3D Downloadable Guns in Pennsylvania" (Press release). Pennsylvania Office of Attorney General. 29 July 2018.

bbc.co.uk (Global: 8^th place; English: 10^th place)

Sally Hayden (28 September 2017). From Our Own Correspondent (radio). BBC Radio 4.

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

Bray, Tim (February 2016). "451 Unavailable For Legal Reasons". An HTTP Status Code to Report Legal Obstacles. sec. 3. doi:10.17487/RFC7725. RFC 7725.
Bray, Tim (February 2016). "Identifying Blocking Entities". An HTTP Status Code to Report Legal Obstacles. sec. 4. doi:10.17487/RFC7725. RFC 7725.

engadget.com (Global: 466^th place; English: 349^th place)

"Major US news sites are still blocking Europeans due to GDPR". Engadget. 9 August 2018. Retrieved 27 July 2023.

iana.org (Global: 1,884^th place; English: 1,694^th place)

"Hypertext Transfer Protocol (HTTP) Status Code Registry". IANA. ICANN. 13 November 2024. Retrieved 3 February 2025.

ietf.org (Global: 214^th place; English: 176^th place)

datatracker.ietf.org

Bray, Tim (February 2016). "451 Unavailable For Legal Reasons". An HTTP Status Code to Report Legal Obstacles. sec. 3. doi:10.17487/RFC7725. RFC 7725.
Bray, Tim (February 2016). "Identifying Blocking Entities". An HTTP Status Code to Report Legal Obstacles. sec. 4. doi:10.17487/RFC7725. RFC 7725.

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

Nottingham, Mark (18 December 2015). "Why 451?". mnot’s blog. Retrieved 20 December 2015.

niemanlab.org (Global: low place; English: 6,277^th place)

"More than 1,000 U.S. News sites are still unavailable in Europe, two months after GDPR took effect". www.niemanlab.org.

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

wiki.openrightsgroup.org

"Cleanfeed". ORG Wiki. Open Rights Group. If the request is for the blocked content then the proxy server will return a 404 error page to the customer

qwghlm.co.uk (Global: low place; English: low place)

Applegate, Chris (9 December 2008). "There is no HTTP code for censorship". qwghlm.co.uk. Archived from the original on 19 April 2021. Retrieved 23 December 2015.

rfc-editor.org (Global: 6,184^th place; English: 4,465^th place)

Bray, Tim (February 2016). "451 Unavailable For Legal Reasons". An HTTP Status Code to Report Legal Obstacles. sec. 3. doi:10.17487/RFC7725. RFC 7725.
Bray, Tim (February 2016). "Identifying Blocking Entities". An HTTP Status Code to Report Legal Obstacles. sec. 4. doi:10.17487/RFC7725. RFC 7725.
Stéphane Bortzmeyer (11 November 2017). "RFC Errata Report". IETF Tools. Retrieved 3 December 2018.

sophos.com (Global: low place; English: 8,773^rd place)

nakedsecurity.sophos.com

Ducklin, Paul (19 August 2013). "HTTP error code 451: "Unavailable For Legal Reasons"". Naked Security. Sophos. Archived from the original on 6 May 2021. Retrieved 29 November 2018.

theguardian.com (Global: 12^th place; English: 11^th place)

Flood, Alison (22 June 2012). "Call for Ray Bradbury to be honoured with internet error message". The Guardian. Retrieved 22 June 2012.
Arthur, Charles (8 December 2008). "How the IWF blacklist stops you seeing the Scorpions' album cover". Technology blog, The Guardian. TCP Reset is sent back to the customer instead of content.

vice.com (Global: 175^th place; English: 137^th place)

Byrne, Michael (21 December 2015). "The HTTP 451 Error Code for Censorship Is Now an Internet Standard". Vice. Retrieved 3 July 2020.

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

Ducklin, Paul (19 August 2013). "HTTP error code 451: "Unavailable For Legal Reasons"". Naked Security. Sophos. Archived from the original on 6 May 2021. Retrieved 29 November 2018.
Applegate, Chris (9 December 2008). "There is no HTTP code for censorship". qwghlm.co.uk. Archived from the original on 19 April 2021. Retrieved 23 December 2015.

wired.co.uk (Global: 2,053^rd place; English: 1,340^th place)

Matt Burgess (29 August 2018). "The tyranny of GDPR popups and the websites failing to adapt". WIRED. Retrieved 1 October 2018.