NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 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, all time — NPA 304
FRONTIER WEST VIRGINIA INC. 256
CITIZENS TEL CO OF WV DBA FRONTIER OF WV 86
NEW CINGULAR WIRELESS PCS, LLC - DC 54
GATEWAY TELECOM LLC DBA STRATUSWAVE COMM LLC WV 47
FIBERNET, LLC - WV 43
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
2026-01-08 304-251 2XXX3XXX4XXX9XXX which blocks → HD CARRIER LLC 321J BLUEFIELD WV
2025-05-16 304-987 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PRKRSBGZN1 WV
2023-05-22 304-304 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H CHRLSTNZN1 WV
2023-05-18 304-681 7XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - WV 9944 GRANTSVL WV
2022-06-21 304-560 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LOGAN WV
2022-04-28 304-718 0XXX1XXX2XXX3XXX4XXX5XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J ROWLESBURG WV
2021-10-11 304-246 0–9 XXXall 10 · 4 holders which blocks → UNITED STATES CELLULAR - WV 6284 SUMMERSVL WV
2018-10-10 304-996 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF WEST VIRGINIA, LLC - WV 928H KINGWOOD WV
2018-05-03 304-990 0–9 XXXall 10 · 5 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 WHELNGZON5 WV
2017-01-25 304-244 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF WEST VIRGINIA, LLC - WV 928H MORGANTOWN WV
2016-01-04 304-427 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HILLSBORO WV
2014-03-28 304-814 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - WV 080F BUFFALO WV
2014-02-17 304-786 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 RIPLEY WV
2011-11-21 304-362 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 BECKLEY WV
2011-03-20 304-330 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 CHRLSTNZN1 WV
2011-01-07 304-435 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHEAT LAKE WV
2010-03-30 304-350 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 MARTINSBG WV
2010-03-30 304-666 0–9 XXXall 10 · 5 holders which blocks → ARMSTRONG TELECOMMUNICATIONS, INC. - WV 423C WEST UNION WV
2010-03-12 304-900 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → SHENTEL COMMUNICATIONS, LLC. - WV 489F FAYETTEVL WV
2010-02-19 304-240 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 FALLNGWTRS WV
2010-02-03 304-490 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 LOST RIVER WV
2010-01-12 304-966 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WV 6394 PRKRSBGZN1 WV
2009-08-17 304-500 0XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BERKELYSPG WV
2009-03-19 304-800 0–9 XXXall 10 · 4 holders which blocks → CITYNET WEST VIRGINIA, LLC - WV 545B BLUEFIELD WV
2009-02-17 304-213 not yet reported which blocks → COMCAST IP PHONE, LLC 318J WORTHINGTN WV
2008-12-02 304-719 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MOUNT HOPE WV
2008-11-24 304-202 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → SHENTEL COMMUNICATIONS, LLC. - WV 489F PINEVILLE WV
2008-09-04 304-410 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - WV 080F CHRLSTNZN1 WV
2008-08-06 304-300 0–9 XXXall 10 · 2 holders which blocks → YMAX COMMUNICATIONS CORP. - WV 368E CLARKSBURG WV
2008-07-30 304-708 not yet reported which blocks → COMCAST IP PHONE, LLC 318J MT MORRIS WV
2008-06-25 304-400 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CHRLSTNZN1 WV
2008-06-19 304-443 0–9 XXXall 10 · 6 holders which blocks → EAST KENTUCKY NETWRK, LLC DBA APPALACHIAN WIRELESS 6940 WILLIAMSON WV
2008-05-28 304-918 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - WV 080F CLARKSBURG WV
2008-05-16 304-970 0XXX1XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FIBERNET, LLC - WV 4095 KIMBALL WV
2008-05-15 304-359 0–9 XXXall 10 · 3 holders which blocks → IDT AMERICA, CORP. - WV 317C ROMNEY WV
2008-05-13 304-980 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → IDT AMERICA, CORP. - WV 317C REEDSVILLE WV
2008-05-13 304-999 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → IDT AMERICA, CORP. - WV 317C FORT ASHBY WV
2008-04-29 304-974 0–9 XXXall 10 · 3 holders which blocks → IDT AMERICA, CORP. - WV 317C MORGANTOWN WV
2008-03-20 304-951 0–9 XXXall 10 · 2 holders which blocks → FIBERNET, LLC - WV 4095 CHRLSTNZN1 WV
2008-03-04 304-979 4XXX7XXX8XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BRIDGEPORT WV
2008-02-19 304-207 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BECKLEY WV
2008-02-06 304-356 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CHRLSTNZN1 WV
2008-01-21 304-956 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WV 6394 WHSLPHRSPG WV
2007-12-18 304-809 0–9 XXXall 10 · 4 holders which blocks → LUMOS NETWORKS INC. - VA 7849 BLUEFIELD WV
2007-11-14 304-241 0–9 XXXall 10 · 6 holders which blocks → LUMOS NETWORKS INC. - VA 7849 MORGANTOWN WV
2007-11-14 304-969 0–9 XXXall 10 · 8 holders which blocks → LUMOS NETWORKS INC. - VA 7849 CLARKSBURG WV
2007-10-19 304-901 0–9 XXXall 10 · 6 holders which blocks → CITYNET WEST VIRGINIA, LLC - WV 545B MARTINSBG WV
2007-07-02 304-995 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 FALLNGWTRS WV
2007-06-14 304-997 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WV 6394 WESTON WV
2007-06-06 304-975 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WV 6394 WHELNGZON2 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.