Loading Calculator...
Operational Consent Required
We use telemetry and cookies to optimize your signaling calculation experience. Enabling data streams helps us fund mission-critical R&D.
Subscriber identity analysis utility for decoding International Mobile Subscriber Identity (IMSI) values, extracting MCC, MNC, and MSIN fields, and identifying the home operator.
IMSI MCC-MNC decoders split mobile identities into country and operator codes for authorized roaming, fraud, and analytics workflows.
The decoder uses the ITU-T E.212 MCC registry and operator MNC assignments to map the first 5–6 digits of an IMSI to a PLMN, extracting the remaining digits as the operator-assigned MSIN.
Built on 3GPP Technical Specifications, ensuring accuracy for production deployments and security audits.
Calculations specifically designed to identify protocol vulnerabilities and signaling misconfigurations.
Essential for roaming troubleshooting, SIM provisioning validation, and security research. IMSI structure knowledge underpins protection against IMSI catchers and identity privacy attacks (SUPI concealment in 5G).
Edge-V8 Isolate
Technical Audit
< 50ms (Global)
Secured by Auth0
An IMSI starting 310150… decodes to US MCC 310 with MNC 150 when using 3-digit MNC interpretation for that range.
Requires up-to-date MNC length knowledge; not a substitute for official GSMA lists in formal interconnect.
IMSI = MCC (3 digits) + MNC (2–3 digits) + MSIN. MNC length is operator/national dependent; databases help disambiguate.
Wrong split mis-identifies the operator—critical for roaming steering, fraud, and analytics.
Use only on lawfully obtained identifiers in authorized security/ops workflows. Respect privacy and lawful intercept rules.
IPv4 CIDR boundary and host range calculation tool.
Estimate the cryptographic resistance and brute-force complexity of mobile encryption algorithms.
Calculate the composition and signaling footprint of 3GPP authentication vectors across generations.
Master Modern Telecom Network Attacks & Defense
Go beyond calculations. Access the TelcoSec Academy sandbox to practice real-world SS7 firewall bypass simulations, Diameter exploit analysis, and RAN security hardening.
SSO Link: Academy Node 0x93FF