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
2019-03-25 681-292 0–9 XXXall 10 · 3 holders which blocks → CSC WIRELESS, LLC 425J FLAT TOP WV
2019-03-18 681-271 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WV 077G MOOREFIELD WV
2019-03-12 681-261 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 FALLNGWTRS WV
2019-03-06 681-266 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 KEYSER WV
2019-01-30 681-799 0–9 XXXall 10 · 2 holders which blocks → HD CARRIER LLC 321J CHRLSTNZN1 WV
2019-01-16 681-999 0–9 XXXall 10 · 4 holders which blocks → TERRA NOVA TELECOM INC. 145J MORGANTOWN WV
2018-12-26 681-259 0XXX1XXX2XXX6XXX · 2 holders which blocks → ONVOY, LLC - WV 449F HARMAN WV
2018-12-26 681-263 0XXX1XXX2XXX6XXX8XXX · 3 holders which blocks → ONVOY, LLC - WV 449F LEVELS WV
2018-12-26 681-277 0XXX1XXX2XXX3XXX4XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC - WV 449F HUNDRED WV
2018-12-26 681-345 0XXX1XXX3XXX6XXX · 2 holders which blocks → ONVOY, LLC - WV 449F SARDIS WV
2018-12-26 681-384 3XXX4XXX5XXX6XXX · 2 holders which blocks → ONVOY, LLC - WV 449F MT MORRIS WV
2018-12-26 681-395 0XXX1XXX3XXX6XXX · 2 holders which blocks → ONVOY, LLC - WV 449F JOETOWN WV
2018-12-26 681-403 2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → ONVOY, LLC - WV 449F PINE GROVE WV
2018-12-26 681-405 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - WV 449F W MILFORD WV
2018-12-26 681-414 1XXX3XXX4XXX5XXX6XXX · 3 holders which blocks → ONVOY, LLC - WV 449F READER WV
2018-12-26 681-419 0XXX1XXX4XXX6XXX · 2 holders which blocks → ONVOY, LLC - WV 449F MAYSVILLE WV
2018-12-26 681-444 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - WV 449F PAW PAW WV
2018-12-26 681-481 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - WV 449F CANAAN VLY WV
2018-12-26 681-550 0XXX4XXX5XXX6XXX8XXX · 3 holders which blocks → ONVOY, LLC - WV 449F WALKERSVL WV
2018-12-26 681-589 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - WV 449F ROMNEY WV
2018-12-26 681-619 0XXX1XXX2XXX3XXX6XXX7XXX · 2 holders which blocks → ONVOY, LLC - WV 449F WADESTOWN WV
2018-12-26 681-680 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - WV 449F EGLON WV
2018-12-26 681-717 1XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - WV 449F WARDENSVL WV
2018-12-26 681-722 0XXX1XXX2XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC - WV 449F SMITHFIELD WV
2018-12-26 681-800 0XXX1XXX2XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - WV 449F HACKER VLY WV
2018-12-26 681-816 0XXX1XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - WV 449F AUGUSTA WV
2018-12-26 681-839 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - WV 449F FAIRMONT WV
2018-12-26 681-949 0XXX1XXX4XXX6XXX9XXX · 3 holders which blocks → ONVOY, LLC - WV 449F WALLACE WV
2018-12-11 681-600 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WV 449F CLARKSBURG WV
2018-11-08 681-253 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 JANE LEW WV
2018-11-08 681-254 0–9 XXXall 10 · 5 holders which blocks → VONAGE AMERICA LLC 197D BECKLEY WV
2018-11-01 681-250 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 PINEVILLE WV
2018-10-25 681-240 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WV 449F SHEPHEDSTN WV
2018-10-25 681-246 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - WV 449F INWOOD WV
2018-10-25 681-248 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - WV 449F MARTINSBG WV
2018-10-01 681-641 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → ONVOY, LLC - WV 449F SETH WV
2018-10-01 681-691 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - WV 449F SCOTTDEPOT WV
2018-10-01 681-861 0XXX1XXX3XXX6XXX8XXX · 3 holders which blocks → ONVOY, LLC - WV 449F IVYDALE WV
2018-09-07 681-661 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - WV 449F CHRLSTNZN1 WV
2018-09-04 681-243 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WV 9944 WELLSBURG WV
2018-08-30 681-227 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WV 9944 FAYETTEVL WV
2018-07-16 681-682 0–9 XXXall 10 · 7 holders which blocks → WIDE VOICE, LLC - WV 729H MADISON WV
2018-06-13 681-234 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → T-MOBILE USA, INC. 6529 CHRLSTNZN6 WV
2018-06-13 681-297 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 PRKRSBGZN3 WV
2018-06-13 681-381 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 CHRLSTNZN3 WV
2018-06-13 681-387 0XXX1XXX3XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 CHRLSTNZN2 WV
2018-06-13 681-432 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 HNTNGTNZN1 WV
2018-06-13 681-505 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 CHRLSTNZN4 WV
2018-06-13 681-588 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 PRKRSBGZN1 WV
2018-06-13 681-689 2XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 HNTNGTNZN4 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.