NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

337 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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 25
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 12
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
2021-10-22 743-231 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H MADISON NC
2021-10-22 743-237 0XXX1XXX3XXX4XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H QUAKER GAP NC
2021-10-22 743-296 0–9 XXXall 10 · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H REIDSVILLE NC
2021-10-22 743-347 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - NC 638E THOMASVL NC
2021-10-22 743-369 0XXX1XXX2XXX3XXX9XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H SANDYRIDGE NC
2021-10-22 772-779 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - FL 937C STUART FL
2021-10-22 774-789 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H BARNSTABLE MA
2021-10-22 781-822 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H WALTHAM MA
2021-10-22 873-818 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Ville-Marie —
2021-10-22 939-410 0–9 XXXwhole prefix which blocks → LIBERTY MOBILE PUERTO RICO INC. 639J SANTURCE PR
2021-10-22 986-212 0–9 XXXall 10 · 5 holders which blocks → AT&T - LOCAL 7421 EMMETT ID
2021-10-21 321-521 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - FL 937C COCOABEACH FL
2021-10-21 386-946 0XXX2XXX3XXX4XXX5XXX6XXX · 5 holders which blocks → FRACTEL, LLC 965H JASPER FL
2021-10-21 720-637 0–9 XXXwhole prefix which blocks → ONVOY, LLC - CO 026D DENVER CO
2021-10-21 720-843 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H DENVER CO
2021-10-21 731-291 0XXX1XXX3XXX8XXX9XXX · 5 holders which blocks → AT&T - LOCAL 7421 BELLS TN
2021-10-21 743-330 0–9 XXXall 10 · 3 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J ELKIN NC
2021-10-21 743-433 0–9 XXXall 10 · 4 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J GREENSBORO NC
2021-10-21 785-631 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → NUSO, LLC 478J TOPEKA KS
2021-10-21 812-960 0XXX1XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H PRAIRIECRK IN
2021-10-21 828-500 0–9 XXXall 10 · 4 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J ASHEVILLE NC
2021-10-21 907-603 6XXX which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC 724J JUNEAU AK
2021-10-21 954-795 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 FTLAUDERDL FL
2021-10-21 980-844 0–9 XXXall 10 · 5 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J CONCORD NC
2021-10-20 207-414 0XXX1XXX2XXX5XXX9XXX · 3 holders which blocks → COMMIO, LLC 939H HOULTON ME
2021-10-20 216-435 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F CLEVELAND OH
2021-10-20 225-340 0XXX1XXX2XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H WILSON LA
2021-10-20 225-350 0XXX1XXX2XXX3XXX4XXX5XXX8XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H JACKSON LA
2021-10-20 225-463 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H ST GABRIEL LA
2021-10-20 225-464 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H LIVINGSTON LA
2021-10-20 225-466 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H STFRNCISVL LA
2021-10-20 225-487 0–9 XXXall 10 · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H VACHERIE LA
2021-10-20 307-396 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - WY 081F GREENRIVER WY
2021-10-20 470-860 0–9 XXXall 10 · 2 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J ATLANTA GA
2021-10-20 551-332 0–9 XXXall 10 · 4 holders which blocks → VONAGE AMERICA LLC 197D BAYONNE NJ
2021-10-20 582-288 0–9 XXXall 10 · 7 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J ST MARYS PA
2021-10-20 582-822 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J ALTOONA PA
2021-10-20 582-855 0–9 XXXall 10 · 6 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J JOHNSTOWN PA
2021-10-20 720-824 0–9 XXXall 10 · 6 holders which blocks → VONAGE AMERICA LLC 197D HUDSON CO
2021-10-20 912-419 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 BRUNSWICK GA
2021-10-19 206-761 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 RICHMNDBCH WA
2021-10-19 224-437 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WHEELING IL
2021-10-19 239-539 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - FL 937C CAPE CORAL FL
2021-10-19 313-540 0–9 XXXall 10 · 5 holders which blocks → VONAGE AMERICA LLC 197D DETROITZN4 MI
2021-10-19 337-567 0–9 XXXwhole prefix which blocks → VOICESTREAM GSM I, LLC 150C BREAUX BDG LA
2021-10-19 340-209 not yet reported which blocks → LIBERTY MOBILE USVI INC. 638J CHTAMSTTHS VI
2021-10-19 346-516 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2021-10-19 442-367 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CALEXICO CA
2021-10-19 470-890 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E ATLANTA GA
2021-10-19 507-860 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 WINONA MN

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.