NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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
2020-12-23 928-449 0XXX1XXX2XXX3XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → ONVOY, LLC - AZ 630E LKMHVRNCHS AZ
2020-12-23 928-519 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AZ 630E MOHAVE VLY AZ
2020-12-23 930-227 0XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F NO VERNON IN
2020-12-22 252-877 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H NEW BERN NC
2020-12-22 281-697 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C SUGAR LAND TX
2020-12-22 331-899 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H LOMBARD IL
2020-12-22 334-993 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H MONTGOMERY AL
2020-12-22 340-203 not yet reported which blocks → T-MOBILE USA, INC. 6529 CHTAMSTTHS VI
2020-12-22 409-290 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - TX 903C PINELAND TX
2020-12-22 425-494 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ISSAQUAH WA
2020-12-22 430-610 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C NEW BOSTON TX
2020-12-22 470-674 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ATLANTA NE GA
2020-12-22 510-971 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 OKLD MN-PD CA
2020-12-22 520-503 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AZ 630E WILLCOX AZ
2020-12-22 520-527 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AZ 630E BENSON AZ
2020-12-22 520-536 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - AZ 630E DOUGLAS AZ
2020-12-22 636-837 0XXX1XXX2XXX3XXX4XXX7XXX8XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J HERCUMPVLY MO
2020-12-22 659-899 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H CORDOVA AL
2020-12-22 712-397 0XXX1XXX2XXX7XXX · 3 holders which blocks → ONVOY, LLC - IA 221F WHITING IA
2020-12-22 743-374 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WINSTN SAL NC
2020-12-22 762-744 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - GA 067D COLUMBUS GA
2020-12-22 912-558 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BRUNSWICK GA
2020-12-22 928-381 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC - AZ 630E GRANDCNYON AZ
2020-12-22 928-393 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AZ 630E PIMA AZ
2020-12-22 928-394 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - AZ 630E BOUSE AZ
2020-12-22 929-561 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN06 NY
2020-12-22 938-899 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H ANNISTON AL
2020-12-22 940-810 0XXX1XXX2XXX6XXX8XXX · 4 holders which blocks → ONVOY, LLC - TX 903C PILOTPOINT TX
2020-12-22 954-310 0–9 XXXall 10 · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 HOLLYWOOD FL
2020-12-22 956-899 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H MCALLEN TX
2020-12-22 972-327 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 TERRELL TX
2020-12-22 984-268 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J RALEIGH NC
2020-12-21 216-899 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H INDEPNDNCE OH
2020-12-21 216-946 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H CLEVELAND OH
2020-12-21 216-966 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H TERRACE OH
2020-12-21 251-910 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AL 604E MOBILE AL
2020-12-21 254-599 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H COPPERASCV TX
2020-12-21 256-910 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AL 604E HUNTSVILLE AL
2020-12-21 302-557 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - DE 969E OCEAN VIEW DE
2020-12-21 302-665 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - DE 969E FREDERICA DE
2020-12-21 302-667 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - DE 969E REHOBOTH DE
2020-12-21 302-676 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - DE 969E MIDDLETOWN DE
2020-12-21 302-878 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - DE 969E MILLSBORO DE
2020-12-21 302-889 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - DE 969E DAGSBORO DE
2020-12-21 307-306 0–9 XXXall 10 · 6 holders which blocks → STRATUS NETWORKS 495J DOUGLAS WY
2020-12-21 319-381 0–9 XXXall 10 · 6 holders which blocks → STRATUS NETWORKS 495J IOWA CITY IA
2020-12-21 332-910 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC- NY 384C NWYRCYZN01 NY
2020-12-21 334-910 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AL 604E MONTGOMERY AL
2020-12-21 365-426 not yet reported which blocks → Bell Mobility 6574 Hamilton —
2020-12-21 425-520 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 BELLEVUE WA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.