NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

3 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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 — NPA 681
NEW CINGULAR WIRELESS PCS, LLC - DC 3
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
2012-06-19 681-888 0–9 XXXall 10 · 4 holders which blocks → CORETEL WEST VIRGINIA, INC. - WV 5833 HNTNGTNZN1 WV
2012-05-07 681-260 0–9 XXXall 10 · 5 holders which blocks → FRONTIER WEST VIRGINIA INC. 9214 MARTINSBG WV
2012-05-07 681-323 0–9 XXXall 10 · 4 holders which blocks → CITIZENS TEL CO OF WV DBA FRONTIER OF WV 0270 BLUEFIELD WV
2012-05-07 681-622 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRONTIER WEST VIRGINIA INC. 9214 CLARKSBURG WV
2012-03-20 681-242 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 FALLNGWTRS WV
2011-10-17 681-313 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CHRLSTNZN1 WV
2011-10-14 681-245 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 CHRLSTNZN1 WV
2011-09-26 681-207 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 BECKLEY WV
2011-09-02 681-204 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 HNTNGTNZN1 WV
2011-08-23 681-235 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WV 6394 SCOTTDEPOT WV
2011-08-02 681-340 0–9 XXXall 10 · 3 holders which blocks → FRONTIER WEST VIRGINIA INC. 9214 CHRLSTNZN1 WV
2011-06-30 681-238 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WV 6394 BECKLEY WV
2011-06-17 681-229 0–9 XXXall 10 · 8 holders which blocks → METROPCS, INC. 5562 PRKRSBGZN1 WV
2011-05-09 681-258 0–9 XXXall 10 · 8 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WV 6394 HEDGESVL WV
2011-04-28 681-328 0XXX1XXX2XXX3XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 WEIRTON WV
2011-04-27 681-205 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CHRLSTNZN1 WV
2011-04-20 681-203 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 HNTNGTNZN1 WV
2011-04-20 681-427 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CHRLSTNZN1 WV
2011-03-09 681-220 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WV 6394 BECKLEY WV
2011-02-14 681-215 0–9 XXXall 10 · 2 holders which blocks → YMAX COMMUNICATIONS CORP. - WV 368E CHRLSTNZN1 WV
2010-12-14 681-533 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - WV 080F WESTON WV
2010-12-09 681-239 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → SHENTEL COMMUNICATIONS, LLC. - WV 489F NORTHFORK WV
2010-12-09 681-499 0XXX2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → SHENTEL COMMUNICATIONS, LLC. - WV 489F ANAWALT WV
2010-12-09 681-729 0XXX1XXX2XXX4XXX7XXX8XXX · 4 holders which blocks → SHENTEL COMMUNICATIONS, LLC. - WV 489F DAVY WV
2010-09-14 681-201 0–9 XXXall 10 · 4 holders which blocks → SHENTEL COMMUNICATIONS, LLC. - WV 489F WELCH WV
2010-06-25 681-212 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MORGANTOWN WV
2010-06-25 681-302 0XXX1XXX2XXX3XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NEWMRTNSVL WV
2010-06-25 681-404 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FAIRMONT WV
2010-06-01 681-200 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CAS COMMUNICATIONS, LLC - WV 875F PRKRSBGZN2 WV
2009-12-09 681-213 not yet reported which blocks → SHENTEL COMMUNICATIONS, LLC. - WV 489F WEBSTERSPG WV
2009-12-09 681-365 not yet reported which blocks → SHENTEL COMMUNICATIONS, LLC. - WV 489F COWEN WV
2009-06-22 681-753 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FAIRMONT WV
2009-06-12 681-456 0–9 XXXall 10 · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - VA 4644 BRIDGEPORT WV
2009-06-12 681-945 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - VA 4644 CHRLSTNZN1 WV
2009-05-19 681-355 0–9 XXXall 10 · 6 holders which blocks → SHENTEL COMMUNICATIONS, LLC. - WV 489F SUMMERSVL WV
2009-05-19 681-892 0–9 XXXall 10 · 7 holders which blocks → SHENTEL COMMUNICATIONS, LLC. - WV 489F PETERSBURG WV
2009-03-26 681-342 0–9 XXXwhole prefix which blocks → FRONTIER WEST VIRGINIA INC. 9214 BRIDGEPORT WV
2009-03-02 681-285 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MORGANTOWN WV
— 681-202 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - WV 449F SNOWSHOE WV
— 681-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT WV
— 681-218 0–9 XXXall 10 · 5 holders which blocks → LUMOS NETWORKS INC. - VA 7849 ANSTED WV
— 681-221 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CSC VOICE, LLC 612K EAST BANK WV
— 681-257 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → ONVOY, LLC - WV 449F MANNINGTON WV
— 681-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT WV
— 681-341 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CHRLSTNZN1 WV
— 681-359 3XXX5XXX6XXX · 2 holders which blocks → ONVOY, LLC - WV 449F VALLEY ML WV
— 681-367 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → COMMIO, LLC 939H WESTON WV
— 681-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT WV
— 681-433 0–9 XXXall 10 · 6 holders which blocks → TELNYX LLC 073H WESTON WV
— 681-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT WV

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.