Where the data comes from
Every report names its sources with the time each one was read. This page is the same list with what each one costs you directly.
The IMEI checksum
The 15th digit of an IMEI is computed from the other 14 with the Luhn formula, the same sum a bank card uses. We do the sum on our own server. A pass means the number was typed correctly. It does not prove the phone is real.
Free. Arithmetic.
https://en.wikipedia.org/wiki/International_Mobile_Equipment_Identity
Osmocom TAC database
The first eight digits of an IMEI are the Type Allocation Code, which the GSMA gives to each phone model. The GSMA's own list is only for its members. Osmocom keeps an open, community maintained copy of 22,524 codes. We use the export of 2026-09-24. It is thin on phones from the last few years, so a code that is not in it is reported as not in the list, never guessed.
Free, under the Creative Commons Attribution ShareAlike 3.0 licence.
CheckMEND by Recipero
The blacklist, lost, stolen and insurance claim records. Recipero gathers them from the UK networks, the GSMA device registry, the police, insurers and retailers. No government body publishes these. Every report prints the supplier's certificate reference so the answer can be verified with them.
Paid. This is the part of the report you cannot get free anywhere. A single consumer check on their own site is £1.99, read 24 September 2026.
Make and model come from the Osmocom TAC database, an open community list published under the Creative Commons Attribution ShareAlike 3.0 licence, http://tacdb.osmocom.org/ .