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
2014-01-22 681-217 0–9 XXXall 10 · 6 holders which blocks → CSC VOICE, LLC 612K CHRLSTNZN6 WV
2014-01-09 681-231 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - WV 080F MOOREFIELD WV
2013-11-26 681-298 0–9 XXXall 10 · 5 holders which blocks → CSC VOICE, LLC 612K ELKINS WV
2013-11-12 681-232 2XXX6XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WV 077G PRINCETON WV
2013-10-23 681-265 0–9 XXXwhole prefix which blocks → CSC VOICE, LLC 612K CHRLSTNZN1 WV
2013-10-23 681-282 0XXX1XXX5XXX · 2 holders which blocks → CSC VOICE, LLC 612K PRINCETON WV
2013-09-10 681-675 2XXX5XXX7XXX8XXX · 3 holders which blocks → CSC VOICE, LLC 612K LETART WV
2013-08-13 681-758 0–9 XXXall 10 · 7 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K FAIRMONT WV
2013-08-02 681-230 0–9 XXXall 10 · 6 holders which blocks → CORETEL WEST VIRGINIA, INC. - WV 5833 CLENDENIN WV
2013-08-02 681-288 1XXX2XXX3XXX6XXX7XXX8XXX · 3 holders which blocks → CORETEL WEST VIRGINIA, INC. - WV 5833 COWEN WV
2013-08-02 681-334 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → CORETEL WEST VIRGINIA, INC. - WV 5833 OCEANA WV
2013-08-02 681-351 0XXX1XXX2XXX3XXX4XXX6XXX · 6 holders which blocks → CORETEL WEST VIRGINIA, INC. - WV 5833 HAMLIN WV
2013-08-02 681-352 0–9 XXXall 10 · 6 holders which blocks → CORETEL WEST VIRGINIA, INC. - WV 5833 MAN WV
2013-08-02 681-408 0XXX1XXX2XXX6XXX7XXX · 5 holders which blocks → CORETEL WEST VIRGINIA, INC. - WV 5833 HARRISVL WV
2013-08-02 681-532 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → CORETEL WEST VIRGINIA, INC. - WV 5833 MULLENS WV
2013-08-02 681-642 0–9 XXXall 10 · 8 holders which blocks → CORETEL WEST VIRGINIA, INC. - WV 5833 ALDERSON WV
2013-08-02 681-797 0–9 XXXall 10 · 7 holders which blocks → CORETEL WEST VIRGINIA, INC. - WV 5833 MINERLWLLS WV
2013-08-02 681-823 0–9 XXXall 10 · 7 holders which blocks → CORETEL WEST VIRGINIA, INC. - WV 5833 OAK HILL WV
2013-07-29 681-228 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → IDT AMERICA, CORP. - WV 317C THOMAS WV
2013-07-29 681-262 0XXX2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → CSC VOICE, LLC 612K RUPERT WV
2013-07-29 681-409 0XXX which blocks → BANDWIDTH.COM CLEC, LLC - WV 080F FRANKFORD WV
2013-07-29 681-442 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → CORETEL WEST VIRGINIA, INC. - WV 5833 GRANTSVL WV
2013-07-29 681-515 2XXX5XXX7XXX · 3 holders which blocks → CSC VOICE, LLC 612K NEW HAVEN WV
2013-07-29 681-875 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → CORETEL WEST VIRGINIA, INC. - WV 5833 MARLINTON WV
2013-07-26 681-206 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CORETEL WEST VIRGINIA, INC. - WV 5833 ARBOVALE WV
2013-07-26 681-224 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CORETEL WEST VIRGINIA, INC. - WV 5833 DUNLOW WV
2013-07-26 681-312 0XXX3XXX4XXX9XXX · 2 holders which blocks → CORETEL WEST VIRGINIA, INC. - WV 5833 CAMERON WV
2013-07-26 681-320 0XXX2XXX3XXX4XXX5XXX6XXX · 4 holders which blocks → CORETEL WEST VIRGINIA, INC. - WV 5833 BURLINGTON WV
2013-07-26 681-375 0XXX3XXX6XXX8XXX9XXX · 3 holders which blocks → CORETEL WEST VIRGINIA, INC. - WV 5833 BLACKSVL WV
2013-07-26 681-435 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → IDT AMERICA, CORP. - WV 317C DAVIS WV
2013-07-26 681-441 0XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - WV 080F BRUCETONML WV
2013-07-26 681-448 0XXX2XXX3XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → CORETEL WEST VIRGINIA, INC. - WV 5833 CAPON BDG WV
2013-07-17 681-315 0–9 XXXall 10 · 5 holders which blocks → DIGITAL CONNECTIONS, INC. - WV 5201 PRKRSBGZN1 WV
2013-03-06 681-284 0XXX1XXX2XXX3XXX4XXX5XXX8XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J BRAMWELL WV
2013-02-28 681-343 not yet reported which blocks → COMCAST IP PHONE, LLC 318J PAW PAW WV
2013-02-25 681-208 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WV 6394 SUMMERSVL WV
2013-02-25 681-443 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WV 6394 FAIRMONT WV
2013-02-21 681-252 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J CHARLES TN WV
2013-02-21 681-378 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J HNTNGTNZN1 WV
2013-02-06 681-225 not yet reported which blocks → SHENTEL COMMUNICATIONS, LLC. - WV 489F WAR WV
2013-01-31 681-251 0XXX1XXX2XXX5XXX8XXX9XXX · 4 holders which blocks → SHENTEL COMMUNICATIONS, LLC. - WV 489F MAYBEURY WV
2013-01-31 681-329 0XXX1XXX2XXX3XXX4XXX5XXX · 4 holders which blocks → SHENTEL COMMUNICATIONS, LLC. - WV 489F COALWOOD WV
2012-11-06 681-255 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BLUEFIELD WV
2012-10-23 681-358 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WV 6394 RIPLEY WV
2012-10-15 681-209 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WV 6394 MORGANTOWN WV
2012-08-01 681-434 0XXX1XXX2XXX3XXX4XXX5XXX · 4 holders which blocks → SHENTEL COMMUNICATIONS, LLC. - WV 489F GARY WV
2012-07-25 681-214 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - WV 080F FAIRMONT WV
2012-07-25 681-495 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - WV 080F WESTON WV
2012-06-19 681-222 0–9 XXXall 10 · 4 holders which blocks → CORETEL WEST VIRGINIA, INC. - WV 5833 BECKLEY WV
2012-06-19 681-319 0–9 XXXall 10 · 4 holders which blocks → CORETEL WEST VIRGINIA, INC. - WV 5833 CHRLSTNZN1 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.