Tools

MCC-MNC lookup & IMSI decoder

Identify the country and operator behind any IMSI, or search the PLMN table (MCC + MNC) directly across 3,000+ mobile networks worldwide. The table downloads once and every query resolves in your browser.

How to read an IMSI

The IMSI (International Mobile Subscriber Identity, 3GPP TS 23.003) identifies the subscriber on any mobile network. Its first three digits are the MCC (Mobile Country Code: 214 Spain, 310 US), the next 2 or 3 the MNC (Mobile Network Code) that each country's authority assigns per operator, and the rest the MSIN — the subscriber number within that operator. MCC + MNC form the PLMN code, the identity a network broadcasts. The 2-vs-3-digit MNC ambiguity is resolved against the table: this tool tries both splits and shows every match. On multi-IMSI SIMs — common in IoT — a single card can present IMSIs from different countries depending on the visited network.

Related

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Frequently asked questions

What are MCC and MNC?
The MCC (Mobile Country Code) is a three-digit code the ITU assigns per country or geography: 214 is Spain, 310 is the US. The MNC (Mobile Network Code) is the two- or three-digit code identifying each operator within that country: 214-07 is Movistar and 310-410 AT&T. Together they form a mobile network's PLMN identifier.
Can I identify the operator from an IMSI?
Yes: digits 4–5 (or 4–6) of the IMSI are the issuing operator's MNC, and this tool matches them against a table of 3,000+ networks. One IoT nuance: with multi-IMSI or permanent-roaming SIMs, the IMSI identifies the profile's issuing operator, which may not be the network actually serving the device at a given moment.
Why does my IMSI return two possible operators?
Because an MNC can be 2 or 3 digits long and the IMSI itself doesn't say which: if both the 2-digit and the 3-digit reading after the MCC exist in the table, both are shown. In practice each country's numbering plan fixes the length — almost all European countries use 2-digit MNCs.
Where does the table data come from?
From the public MCC/MNC list maintained on Wikipedia from ITU records and national regulators, packaged as an open-source dataset (MIT license). It's refreshed with each release of this page; if you spot a stale code, tell us.

Does your current SIM lock you to one network?

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