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
2001-11-19 304-885 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WV 9944 CHARLES TN WV
2001-11-19 304-886 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 FALLNGWTRS WV
2001-09-20 304-444 none assigned yet which blocks → T-MOBILE USA, INC. 6529 CHRLSTNZN1 WV
2001-09-20 304-550 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CHRLSTNZN1 WV
2001-07-16 304-376 6XXX8XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MORGANTOWN WV
2001-07-16 304-516 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 BUCKHANNON WV
2001-07-16 304-517 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 WESTON WV
2001-07-16 304-518 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → METROPCS, INC. 5562 GRAFTON WV
2001-07-16 304-593 4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PTPLEASANT WV
2001-07-16 304-857 1XXX2XXX5XXX6XXX8XXX · 4 holders which blocks → LUMOS NETWORKS INC. - VA 7849 PTPLEASANT WV
2001-06-12 304-512 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 8 holders which blocks → T-MOBILE USA, INC. 6529 RAVENSWOOD WV
2001-06-12 304-514 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → METROPCS, INC. 5562 RIPLEY WV
2001-06-12 304-731 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 BECKLEY WV
2001-06-12 304-741 4XXX5XXX8XXX9XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 CHRLSTNZN1 WV
2001-06-12 304-751 1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 HNTNGTNZN1 WV
2001-06-12 304-834 1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 PRKRSBGZN1 WV
2001-06-12 304-844 1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 CLARKSBURG WV
2001-05-17 304-461 4XXX6XXX7XXX8XXX · 2 holders which blocks → LUMOS NETWORKS INC. - VA 7849 BECKLEY WV
2001-04-16 304-395 none assigned yet which blocks → T-MOBILE USA, INC. 6529 CHRLSTNZN1 WV
2001-04-16 304-476 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CLARKSBURG WV
2001-04-16 304-582 none assigned yet which blocks → UNITED STATES CELLULAR - WV 6284 MARTINSBG WV
2001-04-16 304-699 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WV 9944 PRKRSBGZN1 WV
2001-02-12 304-374 5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WEIRTON WV
2001-02-12 304-468 not yet reported which blocks → A.V. LAUTTAMUS COMMUNICATIONS, INC. 3866 WEIRTON WV
2001-01-10 304-893 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRONTIER WEST VIRGINIA INC. 9214 PRKRSBGZN1 WV
2001-01-10 304-894 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → FRONTIER WEST VIRGINIA INC. 9214 BECKLEY WV
— 304-200 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 WILLIAMSTN WV
— 304-201 not yet reported which blocks → FIBERNET, LLC - WV 4095 CHRLSTNZN5 WV
— 304-203 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CLARKSBURG WV
— 304-204 not yet reported which blocks → FIBERNET, LLC - WV 4095 CHRLSTNZN6 WV
— 304-206 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CHRLSTNZN1 WV
— 304-208 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HNTNGTNZN1 WV
— 304-210 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - VA 4644 PRKRSBGZN1 WV
— 304-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WV
— 304-212 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WV 9944 MORGANTOWN WV
— 304-214 not yet reported which blocks → GATEWAY TELECOM LLC DBA STRATUSWAVE COMM LLC WV 2704 WHELNGZON1 WV
— 304-215 1XXX4XXX6XXX8XXX · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 WHELNGZON1 WV
— 304-216 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MORGANTOWN WV
— 304-217 2XXX3XXX · 2 holders which blocks → GATEWAY TELECOM LLC DBA STRATUSWAVE COMM LLC WV 2704 WHELNGZON2 WV
— 304-218 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 WHELNGZON1 WV
— 304-219 2XXX3XXX · 2 holders which blocks → GATEWAY TELECOM LLC DBA STRATUSWAVE COMM LLC WV 2704 WHELNGZON3 WV
— 304-221 2XXX3XXX · 2 holders which blocks → GATEWAY TELECOM LLC DBA STRATUSWAVE COMM LLC WV 2704 WHELNGZON5 WV
— 304-222 none assigned yet which blocks → T-MOBILE USA, INC. 6529 BECKLEY WV
— 304-223 0XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → CSC VOICE, LLC 612K FLAT TOP WV
— 304-224 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 WEIRTON WV
— 304-225 not yet reported which blocks → FIBERNET, LLC - WV 4095 MORGANTOWN WV
— 304-226 not yet reported which blocks → CITIZENS TEL CO OF WV DBA FRONTIER OF WV 0270 COWEN WV
— 304-227 not yet reported which blocks → CITIZENS TEL CO OF WV DBA FRONTIER OF WV 0270 HARMAN WV
— 304-228 none assigned yet which blocks → UNITED STATES CELLULAR - WV 6284 BECKLEY WV
— 304-229 not yet reported which blocks → FRONTIER WEST VIRGINIA INC. 9214 INWOOD 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.