NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

341 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 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
— 307-950 not yet reported which blocks → WY
— 307-958 not yet reported which blocks → WY
— 307-959 not yet reported which blocks → WY
— 307-970 not yet reported which blocks → WY
— 307-976 not yet reported which blocks → WY
— 307-977 not yet reported which blocks → UNION TELEPHONE COMPANY 013B LARAMIE WY
— 307-988 not yet reported which blocks → WY
— 307-995 none assigned yet which blocks → QWEST CORPORATION 9636 CASPER WY
— 307-996 0XXX3XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - WY 450F CHEYENNE WY
— 308-210 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 732J GRAND IS NE
— 308-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NE
— 308-220 1XXX8XXX9XXX · 3 holders which blocks → UNITED TEL CO OF THE WEST DBA CENTURYLINK - NE 4530 SCOTSBLUFF NE
— 308-221 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NE 3233 NO PLATTE NE
— 308-226 not yet reported which blocks → NEBRASKA CENTRAL TEL. CO. 1574 DANNEBROG NE
— 308-228 not yet reported which blocks → ELSIE COMMUNICATIONS, INC. 1518 ELSIE NE
— 308-232 not yet reported which blocks → GREAT PLAINS COMMUNICATIONS, INC. 1577 MIRAGEFLTS NE
— 308-233 none assigned yet which blocks → CITIZENS TELECOM OF NE LLC DBA FRONTIER COM OF NE 1128 KEARNEY NE
— 308-234 not yet reported which blocks → CITIZENS TELECOM OF NE LLC DBA FRONTIER COM OF NE 1128 KEARNEY NE
— 308-235 none assigned yet which blocks → UNITED TEL CO OF THE WEST DBA CENTURYLINK - NE 4530 KIMBALL NE
— 308-236 not yet reported which blocks → CITIZENS TELECOM OF NE LLC DBA FRONTIER COM OF NE 1128 KEARNEY NE
— 308-237 not yet reported which blocks → CITIZENS TELECOM OF NE LLC DBA FRONTIER COM OF NE 1128 KEARNEY NE
— 308-238 8XXX which blocks → CITIZENS TELECOM OF NE LLC DBA FRONTIER COM OF NE 1128 KEARNEY NE
— 308-239 3XXX8XXX · 2 holders which blocks → CONSOLIDATED TELCO, INC. 1530 PAXTON NE
— 308-240 not yet reported which blocks → N.E. COLORADO CELLULAR, INC. 6874 KEARNEY NE
— 308-245 not yet reported which blocks → NEBRASKA CENTRAL TEL. CO. 1574 SCOTIA NE
— 308-246 not yet reported which blocks → GREAT PLAINS COMMUNICATIONS, INC. 1577 WOLBACH NE
— 308-247 not yet reported which blocks → UNITED TEL CO OF THE WEST DBA CENTURYLINK - NE 4530 MORRILL NE
— 308-249 8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE 5807 SIDNEY NE
— 308-254 not yet reported which blocks → QWEST CORPORATION 9631 SIDNEY NE
— 308-258 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → AT&T - LOCAL 7421 GRAND IS NE
— 308-262 3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → QWEST CORPORATION 9631 BRIDGEPORT NE
— 308-263 not yet reported which blocks → GLENWOOD TEL. MEMBERSHIP CORP. 1553 FUNK NE
— 308-265 not yet reported which blocks → ARAPAHOE TEL. CO. 1516 HENDLEY NE
— 308-268 not yet reported which blocks → CITIZENS TELECOM OF NE LLC DBA FRONTIER COM OF NE 1128 BEAVERCITY NE
— 308-269 not yet reported which blocks → CITIZENS TELECOM OF NE LLC DBA FRONTIER COM OF NE 1128 NAPONEE NE
— 308-276 not yet reported which blocks → GREAT PLAINS COMMUNICATIONS, INC. 1577 STRATTON NE
— 308-278 not yet reported which blocks → GREAT PLAINS COMMUNICATIONS, INC. 1577 CULBERTSON NE
— 308-279 4XXX7XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE 5807 BRIDGEPORT NE
— 308-280 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → UNITED STATES CELLULAR - NE 6263 OGALLALA NE
— 308-281 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NE 549E ELWOOD NE
— 308-282 not yet reported which blocks → GREAT PLAINS COMMUNICATIONS, INC. 1577 GORDON NE
— 308-284 1XXX7XXX · 2 holders which blocks → QWEST CORPORATION 9631 OGALLALA NE
— 308-285 not yet reported which blocks → GREAT PLAINS COMMUNICATIONS, INC. 1577 PALISADE NE
— 308-286 not yet reported which blocks → GREAT PLAINS COMMUNICATIONS, INC. 1577 HAYES CTR NE
— 308-287 not yet reported which blocks → ARAPAHOE TEL. CO. 1516 BRULE NE
— 308-289 7XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE 5807 OGALLALA NE
— 308-297 not yet reported which blocks → HARTMAN TEL. EXCH., INC. 1557 HAIGLER NE
— 308-307 not yet reported which blocks → NE
— 308-308 not yet reported which blocks → NE
— 308-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NE

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.