NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, last 30 days
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 21
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2021-03-25 413-823 0XXX1XXX2XXX3XXX4XXX · 4 holders which blocks → ONVOY, LLC - MA 892D WORTHINGTN MA
2021-03-25 463-895 0–9 XXXall 10 · 4 holders which blocks → TWILIO INTERNATIONAL, INC. 506J INDIANAPLS IN
2021-03-25 567-353 0XXX1XXX2XXX3XXX5XXX6XXX8XXX · 4 holders which blocks → TELNYX LLC 073H DELPHOS OH
2021-03-25 602-837 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2021-03-25 619-714 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNDG SNDG CA
2021-03-25 623-268 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2021-03-25 667-356 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - MD 876D SEVERN MD
2021-03-25 667-360 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MD 876D ODENTON MD
2021-03-25 667-363 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - MD 876D SHERWD FOR MD
2021-03-25 667-370 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - MD 876D PARKTON MD
2021-03-25 667-387 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - MD 876D PERRYVILLE MD
2021-03-25 667-396 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MD 876D PT DEPOSIT MD
2021-03-25 667-397 3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - MD 876D SOLOMONS MD
2021-03-25 667-426 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MD 876D TANEYTOWN MD
2021-03-25 667-427 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - MD 876D WEST RIVER MD
2021-03-25 667-476 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MD 876D GLENWOOD MD
2021-03-25 667-477 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - MD 876D HAMPSTEAD MD
2021-03-25 667-567 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MD 876D HAVREGRACE MD
2021-03-25 667-576 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - MD 876D JARRETTSVL MD
2021-03-25 667-657 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - MD 876D CHASE MD
2021-03-25 667-887 1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC - MD 876D WORTHINGTN MD
2021-03-25 667-962 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - MD 876D NORTHBEACH MD
2021-03-25 667-966 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MD 876D NEWWINDSOR MD
2021-03-25 672-644 not yet reported which blocks → CityWest Cable (North) Corp - BC 705F Kitwanga —
2021-03-25 689-230 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 KISSIMMEE FL
2021-03-25 689-231 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 WINTERPARK FL
2021-03-25 717-750 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H DELTA PA
2021-03-25 929-578 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN14 NY
2021-03-25 939-306 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2021-03-25 939-310 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2021-03-25 939-314 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2021-03-24 213-583 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 13 CA
2021-03-24 231-786 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H TRAVERSECY MI
2021-03-24 234-433 0XXX1XXX3XXX4XXX · 2 holders which blocks → ONVOY, LLC - OH 464C NO JACKSON OH
2021-03-24 260-332 1XXX2XXX3XXX6XXX · 2 holders which blocks → ONVOY, LLC - IN 097D WOODBURN IN
2021-03-24 272-322 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - PA 547E KINGSTON PA
2021-03-24 352-809 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 LEESBURG FL
2021-03-24 406-609 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 KALISPELL MT
2021-03-24 431-394 not yet reported which blocks → Bell Mobility 6574 Winnipeg —
2021-03-24 437-515 not yet reported which blocks → Bell Mobility 6574 Toronto —
2021-03-24 438-593 not yet reported which blocks → Bell Mobility 6574 Montreal —
2021-03-24 442-355 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 ESCONDIDO CA
2021-03-24 447-901 0XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H JACKSONVL IL
2021-03-24 502-701 0–9 XXXall 10 · 2 holders which blocks → STRATUS NETWORKS 495J LOUISVILLE KY
2021-03-24 507-790 0XXX1XXX2XXX5XXX6XXX9XXX · 4 holders which blocks → TELNYX LLC 073H BLOOMNPRRI MN
2021-03-24 575-334 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - NM 206F CHAPARRAL NM
2021-03-24 616-465 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H GRAND RPDS MI
2021-03-24 639-270 not yet reported which blocks → Access Communications Co-operative Limited 280H Eston —
2021-03-24 681-361 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PRKRSBGZN1 WV
2021-03-24 774-467 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BROCKTON MA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.