NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

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
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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
2020-07-09 346-955 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H DICKINSON TX
2020-07-09 409-977 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H HTCHCCKSNF TX
2020-07-09 509-504 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 YAKIMA WA
2020-07-09 612-429 0–9 XXXall 10 · 3 holders which blocks → CSC WIRELESS, LLC 425J TWINCITIES MN
2020-07-09 647-316 not yet reported which blocks → IXICA Communications Inc. 812H Toronto —
2020-07-09 659-202 0–9 XXXall 10 · 6 holders which blocks → CSC WIRELESS, LLC 425J BIRMINGHAM AL
2020-07-09 682-946 3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H RHOME TX
2020-07-09 725-277 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H LAS VEGAS NV
2020-07-09 725-345 2XXX4XXX5XXX6XXX · 3 holders which blocks → FRACTEL, LLC 965H GLENDALE NV
2020-07-09 725-356 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H JEAN NV
2020-07-09 737-477 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H LOCKHART TX
2020-07-09 737-577 0XXX1XXX2XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → FRACTEL, LLC 965H BRIGGS TX
2020-07-09 737-733 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H BASTROP TX
2020-07-09 743-213 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E WINSTN SAL NC
2020-07-09 775-699 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H FALLON NV
2020-07-09 854-207 0–9 XXXall 10 · 5 holders which blocks → CSC WIRELESS, LLC 425J CHARLESTON SC
2020-07-09 936-386 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H AUSTONIO TX
2020-07-09 936-842 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → FRACTEL, LLC 965H LOVELADY TX
2020-07-09 936-877 1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H ALTO TX
2020-07-09 940-758 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H DENTON TX
2020-07-09 940-842 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H MINERLWLLS TX
2020-07-09 979-334 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ANGLETON TX
2020-07-08 234-565 1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H SHARON CTR OH
2020-07-08 262-265 0–9 XXXall 10 · 7 holders which blocks → CSC WIRELESS, LLC 425J MILWAUKZN2 WI
2020-07-08 309-619 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → STRATUS NETWORKS 495J CHILLICOTH IL
2020-07-08 501-431 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOTSPRINGS AR
2020-07-08 516-786 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H NASSAUZN03 NY
2020-07-08 516-899 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H NASSAUZN04 NY
2020-07-08 551-310 0–9 XXXall 10 · 4 holders which blocks → VONAGE AMERICA LLC 197D WESTWOOD NJ
2020-07-08 567-732 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H ELMORE OH
2020-07-08 567-788 0XXX4XXX8XXX · 3 holders which blocks → FRACTEL, LLC 965H MARIASTEIN OH
2020-07-08 567-896 0XXX2XXX6XXX7XXX · 3 holders which blocks → FRACTEL, LLC 965H PUT IN BAY OH
2020-07-08 567-946 3XXX4XXX8XXX · 3 holders which blocks → FRACTEL, LLC 965H CRIDERSVL OH
2020-07-08 585-677 4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H CHAFFEE NY
2020-07-08 585-946 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H AKRON NY
2020-07-08 607-465 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H CAMERON NY
2020-07-08 607-567 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H SCHENEVUS NY
2020-07-08 607-602 0XXX1XXX2XXX4XXX5XXX6XXX9XXX · 4 holders which blocks → ONVOY, LLC- NY 384C BIG FLATS NY
2020-07-08 607-833 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H OWEGO NY
2020-07-08 608-690 0–9 XXXall 10 · 6 holders which blocks → CSC WIRELESS, LLC 425J MADISON WI
2020-07-08 631-966 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H BRENTWOOD NY
2020-07-08 680-336 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H WATERTOWN NY
2020-07-08 680-732 0XXX2XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H SODUS NY
2020-07-08 680-808 0XXX1XXX3XXX5XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H HENDERSON NY
2020-07-08 680-842 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H EVANSMILLS NY
2020-07-08 680-946 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H JORDAN NY
2020-07-08 716-577 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H BOSTON NY
2020-07-08 716-722 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → FRACTEL, LLC 965H HOLLAND NY
2020-07-08 716-732 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → FRACTEL, LLC 965H SILVER CRK NY
2020-07-08 716-758 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H CLYMER NY

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.