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
2020-06-11 681-268 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 HNTNGTNZN1 WV
2020-06-01 681-296 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 MULLENS WV
2020-06-01 681-801 0XXX1XXX2XXX3XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - WV 449F FAIRVIEW WV
2020-05-12 681-294 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HNTNGTNZN1 WV
2020-04-14 681-540 0XXX1XXX4XXX6XXX8XXX · 3 holders which blocks → ONVOY, LLC - WV 449F HARPESFRRY WV
2020-02-28 681-330 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → METROPCS, INC. 5562 GRAFTON WV
2020-02-20 681-581 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - WV 449F VAN WV
2020-02-20 681-881 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WV 449F WHARTON WV
2020-02-11 681-279 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HNTNGTNZN1 WV
2020-01-21 681-287 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PRKRSBGZN1 WV
2019-12-02 681-280 0–9 XXXall 10 · 2 holders which blocks → TELNYX LLC 073H CHRLSTNZN1 WV
2019-11-20 681-278 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LOGAN WV
2019-10-24 681-226 0XXX1XXX3XXX4XXX5XXX6XXX · 3 holders which blocks → FRACTEL, LLC 965H WHELNGZON2 WV
2019-10-24 681-348 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H WEIRTON WV
2019-10-09 681-283 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 MARTINSBG WV
2019-10-07 681-510 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H BLUEFIELD WV
2019-10-07 681-710 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H CHRLSTNZN1 WV
2019-10-07 681-810 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H CLARKSBURG WV
2019-09-27 681-300 0XXX which blocks → VONAGE AMERICA LLC 197D PRINCETON WV
2019-09-26 681-402 1XXX2XXX3XXX4XXX5XXX · 2 holders which blocks → ONVOY, LLC - WV 449F WORTHINGTN WV
2019-09-20 681-316 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H BURNSVILLE WV
2019-09-20 681-516 0XXX1XXX2XXX5XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H GAULEY BDG WV
2019-09-20 681-687 0–9 XXXall 10 · 8 holders which blocks → FRACTEL, LLC 965H HNTNGTNZN2 WV
2019-09-20 681-716 0XXX1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H CRAIGSVL WV
2019-09-20 681-732 0XXX1XXX2XXX3XXX4XXX5XXX · 4 holders which blocks → FRACTEL, LLC 965H HELEN WV
2019-09-20 681-916 2XXX5XXX6XXX8XXX · 3 holders which blocks → FRACTEL, LLC 965H EAST LYNN WV
2019-09-19 681-273 0–9 XXXall 10 · 3 holders which blocks → EXIANT COMMUNICATIONS LLC 114J CHRLSTNZN1 WV
2019-08-12 681-500 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → FRACTEL, LLC 965H HNTNGTNZN4 WV
2019-08-12 681-529 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H HNTNGTNZN1 WV
2019-08-12 681-666 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H BECKLEY WV
2019-08-12 681-777 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H CHRLSTNZN5 WV
2019-07-29 681-290 0XXX2XXX3XXX6XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - WV 449F ELK GARDEN WV
2019-07-29 681-293 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - WV 449F RIDGELEY WV
2019-07-01 681-272 0XXX1XXX2XXX3XXX6XXX · 3 holders which blocks → ONVOY, LLC - WV 449F UNION WV
2019-06-27 681-275 0XXX2XXX3XXX4XXX5XXX6XXX · 2 holders which blocks → ONVOY, LLC - WV 449F UNIONRIDGE WV
2019-06-27 681-281 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - WV 449F MILTON WV
2019-06-27 681-308 0XXX3XXX4XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - WV 449F MATEWAN WV
2019-06-27 681-325 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - WV 449F BRANCHLAND WV
2019-06-27 681-366 0XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - WV 449F CHAPMANVL WV
2019-06-27 681-491 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - WV 449F GILBERT WV
2019-06-20 681-270 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WV 449F TERRA ALTA WV
2019-06-20 681-900 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - WV 449F HEDGESVL WV
2019-06-17 681-867 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → COMMIO, LLC 939H MORGANTOWN WV
2019-05-23 681-688 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H WEST UNION WV
2019-05-09 681-412 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - WV 080F GORMANIA WV
2019-04-09 681-333 0XXX1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H CHEAT LAKE WV
2019-03-28 681-439 0XXX1XXX2XXX9XXX · 2 holders which blocks → CSC WIRELESS, LLC 425J PRINCETON WV
2019-03-27 681-289 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BLUEFIELD WV
2019-03-26 681-264 0–9 XXXall 10 · 6 holders which blocks → CSC WIRELESS, LLC 425J ELKINS WV
2019-03-25 681-216 0–9 XXXall 10 · 5 holders which blocks → CORETEL WEST VIRGINIA, INC. - WV 5833 ALLOY 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.