Sources & evidence

The current baseline is built from official ITU E.212 assignment records. 1,980 of 1,980 records carry an official source URL.

Source priority

• National telecom regulator or government record
• Official provider website, policy, price sheet, coverage map, support page, or app listing
• ITU or another recognised standards / industry body
• Provider-submitted document with verifiable ownership
• Independent measurement or reputable primary research
• Clearly-labelled user report

Primary dataset

ITU Operational Bulletin — E.212 Mobile Network Codes assignment records. Each provider page links the exact official source URL(s) recorded for that entity, in its Evidence & sources section.