E.164 hygiene
Canonical addressing and NANP overlays as data quality work — not an HLR lookup product.
Invalid MSISDN Must Not Debit
Learn how the IOSOR platform blocks invalid E.164 phone numbers at ingress, preventing erroneous ledger debits and protecting your prepaid balance.
NANP Overlays Before You Send: Data Quality for Finance
Learn how to parse North American Numbering Plan (NANP) overlays to prevent billing errors. Ensure your finance team quotes the correct rate zones before sending traffic.
E.164 hygiene is not an HLR lookup
Learn why local E.164 formatting and NANP overlay validation differ from real-time HLR lookups, and how to structure your IOSOR routing ledger.