NumberResearch Membership · Data 09/28/2026

Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/28/2026

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 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
2020-07-02 442-322 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 BRAWLEY CA
2020-07-02 509-450 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EPHRATA WA
2020-07-02 607-788 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 2 holders which blocks → FRACTEL, LLC 965H BINGHAMTON NY
2020-07-02 614-618 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 478J COLUMBUS OH
2020-07-02 667-977 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H SALISBURY MD
2020-07-02 669-345 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H GILROY CA
2020-07-02 669-356 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H LOS GATOS CA
2020-07-02 680-300 0XXX1XXX3XXX5XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H ANTWERP NY
2020-07-02 680-345 0XXX1XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H AMBER NY
2020-07-02 680-356 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H SYRACUSE NY
2020-07-02 680-400 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H CANTON NY
2020-07-02 680-500 0XXX1XXX3XXX5XXX6XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H FABIUS NY
2020-07-02 682-529 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H GRANBURY TX
2020-07-02 682-732 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H ALVARADO TX
2020-07-02 682-766 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H RENO TX
2020-07-02 707-770 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H FRFLD-SUIS CA
2020-07-02 707-848 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ROSA CA
2020-07-02 707-866 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H VALLEJO CA
2020-07-02 707-977 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H NAPA CA
2020-07-02 716-755 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H BUFFALO NY
2020-07-02 737-345 0XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → FRACTEL, LLC 965H GRANGER TX
2020-07-02 737-732 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H ROCKDALE TX
2020-07-02 743-234 0XXX4XXX5XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H SEAGROVE NC
2020-07-02 743-345 0XXX1XXX2XXX3XXX4XXX6XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H STONEVILLE NC
2020-07-02 747-356 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H NORTHRIDGE CA
2020-07-02 747-977 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H NO HOLLYWD CA
2020-07-02 820-345 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H EL RIO CA
2020-07-02 850-996 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H WALNUTHILL FL
2020-07-02 870-719 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 HARRISON AR
2020-07-02 904-640 0–9 XXXall 10 · 6 holders which blocks → 1ST POINT COMMUNICATIONS, LLC 489J ST JOHNS FL
2020-07-02 912-733 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H COLLINS GA
2020-07-02 915-465 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H EL PASO TX
2020-07-02 936-946 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → FRACTEL, LLC 965H REKLAW TX
2020-07-02 940-336 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H GAINESVL TX
2020-07-02 940-678 2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H CHICO TX
2020-07-02 951-577 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H CORONA CA
2020-07-02 951-633 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H HEMT HEMT CA
2020-07-02 951-644 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H BANNING CA
2020-07-02 951-946 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H HEMT SNJC CA
2020-07-02 954-758 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H HOLLYWOOD FL
2020-07-02 979-766 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H E BERNARD TX
2020-07-02 989-346 0XXX1XXX2XXX3XXX4XXX5XXX6XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7279 MIO MI
2020-07-01 220-300 0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H WILKESVL OH
2020-07-01 252-800 0XXX1XXX2XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H PINEYWOODS NC
2020-07-01 252-900 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H ROCKYMOUNT NC
2020-07-01 405-901 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 ANADARKO OK
2020-07-01 463-234 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 FISHERS IN
2020-07-01 469-849 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 GRANDPRARI TX
2020-07-01 505-413 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 GALLUP NM
2020-07-01 505-430 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 GALLUP NM

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/28/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.