NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

360 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 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 26
Rogers Communications Canada Inc. (Wireless) 23
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
2021-07-26 346-480 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C CROSBY TX
2021-07-26 346-486 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - TX 903C LIVERPOOL TX
2021-07-26 346-487 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - TX 903C SEABROOK TX
2021-07-26 346-489 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C LA PORTE TX
2021-07-26 346-744 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H HSTNSUBURB TX
2021-07-26 361-966 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H ROBSTOWN TX
2021-07-26 430-285 0XXX1XXX2XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - TX 903C TOM BEAN TX
2021-07-26 470-970 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - GA 067D ATLANTA NW GA
2021-07-26 573-740 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MO 993E BENTON MO
2021-07-26 608-714 4XXX5XXX6XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H MERRIMAC WI
2021-07-26 608-803 0XXX1XXX2XXX3XXX4XXX5XXX8XXX · 6 holders which blocks → TWILIO INTERNATIONAL, INC. 506J SPG GREEN WI
2021-07-26 681-417 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PRKRSBGZN1 WV
2021-07-26 782-854 not yet reported which blocks → ISP Telecom Inc. 4727 Hubbards —
2021-07-26 782-855 not yet reported which blocks → ISP Telecom Inc. 4727 Ketch Harbour —
2021-07-26 782-856 not yet reported which blocks → ISP Telecom Inc. 4727 Mount Uniacke —
2021-07-26 782-857 not yet reported which blocks → ISP Telecom Inc. 4727 Musquodoboit Harbour —
2021-07-26 806-772 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C PLAINVIEW TX
2021-07-26 920-673 0XXX1XXX2XXX3XXX4XXX6XXX8XXX · 5 holders which blocks → ONVOY, LLC - WI 225C SISTER BAY WI
2021-07-26 936-319 1XXX3XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - TX 903C GROVETON TX
2021-07-26 936-477 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H BATSON TX
2021-07-26 936-966 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H HUNTSVILLE TX
2021-07-26 936-977 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → FRACTEL, LLC 965H CROCKETT TX
2021-07-23 251-820 0XXX3XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H ATMORE AL
2021-07-23 351-234 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H HAVERHILL MA
2021-07-23 425-667 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H BOTHELL WA
2021-07-23 425-842 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H NORTH BEND WA
2021-07-23 425-946 0XXX1XXX2XXX3XXX5XXX6XXX8XXX · 6 holders which blocks → FRACTEL, LLC 965H CARNATION WA
2021-07-23 425-966 0XXX2XXX3XXX6XXX7XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H SNOQUMPASS WA
2021-07-23 782-604 not yet reported which blocks → Fibernetics Corporation 464D Oxford —
2021-07-23 782-605 not yet reported which blocks → Fibernetics Corporation 464D Parrsboro —
2021-07-23 782-606 not yet reported which blocks → Fibernetics Corporation 464D Port Dufferin —
2021-07-23 782-607 not yet reported which blocks → Fibernetics Corporation 464D Port Greville —
2021-07-23 782-852 not yet reported which blocks → ISP Telecom Inc. 4727 Elmsdale —
2021-07-23 782-853 not yet reported which blocks → ISP Telecom Inc. 4727 French Village —
2021-07-22 223-265 0XXX1XXX2XXX3XXX6XXX7XXX9XXX · 3 holders which blocks → ONVOY, LLC - PA 547E AKRON PA
2021-07-22 272-279 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F OLYPHANT PA
2021-07-22 316-402 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - KS 205F EL DORADO KS
2021-07-22 386-349 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 DELAND FL
2021-07-22 440-807 0XXX1XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - OH 464C NEW LYME OH
2021-07-22 445-456 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - PA 547E PHLDLPHZN1 PA
2021-07-22 505-487 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 LOS ALAMOS NM
2021-07-22 563-330 0XXX3XXX7XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MONONA IA
2021-07-22 640-207 0XXX1XXX3XXX4XXX6XXX7XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NJ 118F AVALON NJ
2021-07-22 641-240 0XXX2XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 UNIONVILLE IA
2021-07-22 681-389 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 MARTINSBG WV
2021-07-22 725-254 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LAS VEGAS NV
2021-07-22 782-594 not yet reported which blocks → Fibernetics Corporation 464D Maccan —
2021-07-22 782-595 not yet reported which blocks → Fibernetics Corporation 464D Mahone Bay —
2021-07-22 782-596 not yet reported which blocks → Fibernetics Corporation 464D Maitland —
2021-07-22 782-597 not yet reported which blocks → Fibernetics Corporation 464D Mill Village —

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.