NANPA NPA-NXX TELECOM REGISTRY // AREA CODE 313

Area Code 313 (Detroit, MI) Carrier & TCPA Lookup.

Real-time NANPA NPA-NXX carrier line type, operating company number (OCN), wireless porting status, and TCPA DNC serial litigator verification for (313) phone numbers in Detroit, MI.

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NANPA Area Code (313) Telemetry Profile

NPA CODE: +1 (313)
PRIMARY MARKET: Detroit, MI
TIMEZONE: EST (UTC-5)
DOMINANT CARRIERS: Michigan Bell (AT&T), Verizon Wireless, T-Mobile
TCPA DNC SHIELD: ACTIVE (1 CREDIT / LOOKUP)

Test Area Code 313 via cURL or MCP

curl -s "https://verifygrid.io/v1/verify/telecom?phone=%2B13135550199" \
  -H "Authorization: Bearer vg_test_sandbox"

# Returns E.164, line_type (mobile/voip/landline),
# carrier_name, OCN, tcpa_dnc_listed, and safe_to_autodial

// NANPA INDEXPROGRAMMATIC US AREA CODE VERIFICATION DIRECTORY