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
Clear Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 304-890 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BECKLEY WV
— 304-891 not yet reported which blocks → FIBERNET, LLC - WV 4095 WALTON WV
— 304-892 0XXX1XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRONTIER WEST VIRGINIA INC. 9214 NEWBURG WV
— 304-895 not yet reported which blocks → CITIZENS TEL CO OF WV DBA FRONTIER OF WV 0270 LETART WV
— 304-897 not yet reported which blocks → HARDY TELECOMMUNICATIONS, INC. 0259 LOST RIVER WV
— 304-898 0XXX1XXX8XXX which blocks → CITIZENS TEL CO OF WV DBA FRONTIER OF WV 0270 OAKVALE WV
— 304-899 not yet reported which blocks → FIBERNET, LLC - WV 4095 WILLIAMSON WV
— 304-910 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 BLUEFIELD WV
— 304-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WV
— 304-913 0–9 XXXall 10 · 4 holders which blocks → CSC VOICE, LLC 612K PRINCETON WV
— 304-917 0–9 XXXall 10 · 6 holders which blocks → CSC VOICE, LLC 612K PRKRSBGZN1 WV
— 304-920 none assigned yet which blocks → UNITED STATES CELLULAR - WV 6284 BLUEFIELD WV
— 304-921 6XXX8XXX9XXX · 2 holders which blocks → UNITED STATES CELLULAR - WV 6284 BLUEFIELD WV
— 304-922 3XXX4XXX5XXX6XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 BLUEFIELD WV
— 304-924 0XXX1XXX2XXX3XXX4XXX7XXX8XXX · 5 holders which blocks → FRONTIER WEST VIRGINIA INC. 9214 ROCK CAVE WV
— 304-925 not yet reported which blocks → FRONTIER WEST VIRGINIA INC. 9214 CHRLSTNZN1 WV
— 304-926 4XXX7XXX9XXX · 2 holders which blocks → FRONTIER WEST VIRGINIA INC. 9214 CHRLSTNZN1 WV
— 304-927 7XXX8XXX9XXX · 3 holders which blocks → FRONTIER WEST VIRGINIA INC. 9214 SPENCER WV
— 304-929 not yet reported which blocks → FIBERNET, LLC - WV 4095 BECKLEY WV
— 304-934 1XXX2XXX3XXX4XXX8XXX · 5 holders which blocks → FRONTIER WEST VIRGINIA INC. 9214 GLENDANIEL WV
— 304-935 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - WV 080F CHRLSTNZN3 WV
— 304-936 0–9 XXXall 10 · 8 holders which blocks → TELNYX LLC 073H WINFIELD WV
— 304-937 0XXX1XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → FRONTIER WEST VIRGINIA INC. 9214 BUFFALO WV
— 304-938 0XXX1XXX6XXX7XXX · 4 holders which blocks → FRONTIER WEST VIRGINIA INC. 9214 IAEGER WV
— 304-941 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → FRONTIER WEST VIRGINIA INC. 9214 CHRLSTNZN1 WV
— 304-942 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → FRONTIER WEST VIRGINIA INC. 9214 HNTNGTNZN1 WV
— 304-943 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRONTIER WEST VIRGINIA INC. 9214 MORGANTOWN WV
— 304-946 0XXX1XXX3XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → FRONTIER WEST VIRGINIA INC. 9214 LOGAN WV
— 304-947 not yet reported which blocks → CITIZENS TEL CO OF WV DBA FRONTIER OF WV 0270 PAW PAW WV
— 304-949 0XXX8XXX · 2 holders which blocks → FRONTIER WEST VIRGINIA INC. 9214 CHRLSTNZN4 WV
— 304-950 not yet reported which blocks → WV
— 304-954 not yet reported which blocks → FRONTIER WEST VIRGINIA INC. 9214 CHRLSTNZN1 WV
— 304-955 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → T-MOBILE USA, INC. 6529 HNTNGTNZN2 WV
— 304-958 not yet reported which blocks → WV
— 304-959 not yet reported which blocks → WV
— 304-961 1XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → COMMIO, LLC 939H PRINCETON WV
— 304-965 4XXX which blocks → FRONTIER WEST VIRGINIA INC. 9214 CHRLSTNZN3 WV
— 304-967 1XXX2XXX3XXX4XXX6XXX8XXX · 5 holders which blocks → FRONTIER WEST VIRGINIA INC. 9214 BRADSHAW WV
— 304-968 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRONTIER WEST VIRGINIA INC. 9214 DUTCHRIDGE WV
— 304-971 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CSC VOICE, LLC 612K NEW HAVEN WV
— 304-973 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CSC VOICE, LLC 612K BELMONT WV
— 304-976 not yet reported which blocks → WV
— 304-977 3XXX4XXX6XXX7XXX9XXX · 4 holders which blocks → CSC VOICE, LLC 612K MATOAKA WV
— 304-978 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → CSC VOICE, LLC 612K CLAY WV
— 304-983 not yet reported which blocks → WEST SIDE TEL CO 0277 LAUREL PT WV
— 304-984 4XXX5XXX6XXX7XXX · 4 holders which blocks → FRONTIER WEST VIRGINIA INC. 9214 CHRLSTNZN2 WV
— 304-986 0XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → FRONTIER WEST VIRGINIA INC. 9214 MANNINGTON WV
— 304-988 4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → FRONTIER WEST VIRGINIA INC. 9214 CHRLSTNZN2 WV
— 304-992 0–9 XXXall 10 · 5 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 LEWISBURG WV
— 304-998 not yet reported which blocks → FRONTIER WEST VIRGINIA INC. 9214 XXXXXXXXXX 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.