Luhn algorithm (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Luhn algorithm" in English language version.

Last modified: 06:41:40, 11 September 2026 (UTC)

Ref.Un. Ref.Website

Global rank English rank

22web.archive.org

1^st place

21espacenet.com

950^th place

813^th place

11iso.org

1,190^th place

1,097^th place

11usps.com

2,610^th place

1,407^th place

11partitaiva.it

low place

11reddit.com

1,712^th place

1,373^rd place

11instagram.com

98^th place

96^th place

11patents.google.com

1,154^th place

606^th place

espacenet.com (Global: 950^th place; English: 813^th place)

worldwide.espacenet.com

US patent 2950048A, Luhn, Hans Peter, "Computer for Verifying Numbers", published 23 August 1960, issued 23 August 1960

instagram.com (Global: 98^th place; English: 96^th place)

"Instagram". www.instagram.com. Retrieved 2026-09-11.

iso.org (Global: 1,190^th place; English: 1,097^th place)

"Annex B: Luhn formula for computing modulus-10 "double-add-double" check digits". Identification cards — Identification of issuers — Part 1: Numbering system (standard). International Organization for Standardization & International Electrotechnical Commission. January 2017. ISO/IEC 7812-1:2017.

partitaiva.it (Global: low place; English: low place)

Albanese, Ilenia (10 August 2022). "A cosa serve la Partita Iva? Ecco cosa sapere" [What is a VAT number for? Here's what to know]. Partitaiva.it (in Italian). Archived from the original on 29 June 2024. Retrieved 29 June 2024.

patents.google.com (Global: 1,154^th place; English: 606^th place)

US2950048A, "Computer for verifying numbers", issued 1960-08-23

reddit.com (Global: 1,712^th place; English: 1,373^rd place)

"Reddit". www.reddit.com. Retrieved 2026-09-11.

usps.com (Global: 2,610^th place; English: 1,407^th place)

postalpro.usps.com

Publication 199: Intelligent Mail Package Barcode (IMpb) Implementation Guide for Confirmation Services and Electronic Payment Systems (PDF) (28th ed.). United States: United States Postal Service. 10 October 2023. Archived (PDF) from the original on 17 November 2023. Retrieved 29 November 2023.

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

Publication 199: Intelligent Mail Package Barcode (IMpb) Implementation Guide for Confirmation Services and Electronic Payment Systems (PDF) (28th ed.). United States: United States Postal Service. 10 October 2023. Archived (PDF) from the original on 17 November 2023. Retrieved 29 November 2023.
Albanese, Ilenia (10 August 2022). "A cosa serve la Partita Iva? Ecco cosa sapere" [What is a VAT number for? Here's what to know]. Partitaiva.it (in Italian). Archived from the original on 29 June 2024. Retrieved 29 June 2024.

Luhn algorithm (English Wikipedia)

espacenet.com (Global: 950th place; English: 813th place)

worldwide.espacenet.com

instagram.com (Global: 98th place; English: 96th place)

iso.org (Global: 1,190th place; English: 1,097th place)

partitaiva.it (Global: low place; English: low place)

patents.google.com (Global: 1,154th place; English: 606th place)

reddit.com (Global: 1,712th place; English: 1,373rd place)

usps.com (Global: 2,610th place; English: 1,407th place)