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 608
WISCONSIN BELL INC 80
UNITED STATES CELLULAR - WI 76
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 54
FRONTIER NORTH INC. - WI 53
ONVOY, LLC - WI 50
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
— 608-854 not yet reported which blocks → BRIGHTSPEED OF WESTERN WISCONSIN, LLC 0934 HAZELGREEN WI
— 608-855 0XXX1XXX2XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → TDS METROCOM, LLC 520K SPARTA WI
— 608-857 not yet reported which blocks → BRIGHTSPEED OF CENTRAL WISCONSIN, LLC 1159 MINDORO WI
— 608-862 7XXX8XXX · 2 holders which blocks → UTELCO, INC. 0963 ALBANY WI
— 608-868 not yet reported which blocks → BRIGHTSPEED OF WESTERN WISCONSIN, LLC 0841 MILTON WI
— 608-872 6XXX which blocks → BRIGHTSPEED OF WESTERN WISCONSIN, LLC 0922 MOUNT ZION WI
— 608-873 not yet reported which blocks → WISCONSIN BELL INC 9327 STOUGHTON WI
— 608-874 7XXX which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 EASTMAN WI
— 608-875 3XXX which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 WAUZEKA WI
— 608-876 7XXX which blocks → BRIGHTSPEED OF WESTERN WISCONSIN, LLC 0970 FOOTVILLE WI
— 608-877 6XXX which blocks → WISCONSIN BELL INC 9327 STOUGHTON WI
— 608-879 0XXX1XXX4XXX5XXX6XXX8XXX · 3 holders which blocks → FRONTIER NORTH INC. - WI 0886 ORFORDVL WI
— 608-882 1XXX7XXX8XXX · 3 holders which blocks → WISCONSIN BELL INC 9327 EVANSVILLE WI
— 608-883 0XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → WISCONSIN BELL INC 9327 RICHMOND WI
— 608-884 0XXX5XXX · 2 holders which blocks → FRONTIER NORTH INC. - WI 0886 EDGERTON WI
— 608-886 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MADISON WI
— 608-897 0XXX1XXX5XXX6XXX9XXX · 4 holders which blocks → FRONTIER NORTH INC. - WI 0886 BRODHEAD WI
— 608-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WI
— 608-922 7XXX which blocks → BRIGHTSPEED OF CENTRAL WISCONSIN, LLC 1159 GRATIOT WI
— 608-924 0XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → FRONTIER NORTH INC. - WI 0886 RIDGEWAY WI
— 608-927 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H BELOIT WI
— 608-929 0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → BRIGHTSPEED OF WESTERN WISCONSIN, LLC 0922 HIGHLAND WI
— 608-930 0XXX which blocks → MH TELECOM, INC. - WI 3043 DODGEVILLE WI
— 608-934 4XXX6XXX · 2 holders which blocks → UTELCO, INC. 0963 JUDA WI
— 608-935 not yet reported which blocks → FRONTIER NORTH INC. - WI 0886 DODGEVILLE WI
— 608-937 1XXX2XXX3XXX6XXX8XXX9XXX · 4 holders which blocks → FRONTIER NORTH INC. - WI 0886 DODGEVILLE WI
— 608-938 6XXX7XXX8XXX9XXX · 2 holders which blocks → UTELCO, INC. 0963 MONTICELLO WI
— 608-943 0XXX3XXX7XXX9XXX · 3 holders which blocks → BRIGHTSPEED OF CENTRAL WISCONSIN, LLC 1159 MONTFORT WI
— 608-949 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF WISCONSIN, LLC - WI 227F MADISON WI
— 608-950 not yet reported which blocks → WI
— 608-957 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → WISCONSIN BELL INC 9327 MADISON WI
— 608-958 not yet reported which blocks → MADISON WI
— 608-959 not yet reported which blocks → WI
— 608-963 none assigned yet which blocks → UNITED STATES CELLULAR - WI 6274 BARABOO WI
— 608-965 1XXX9XXX · 2 holders which blocks → BRIGHTSPEED OF CENTRAL WISCONSIN, LLC 1159 SHULLSBURG WI
— 608-966 5XXX8XXX9XXX · 2 holders which blocks → UTELCO, INC. 0963 BROWNTOWN WI
— 608-967 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRONTIER NORTH INC. - WI 0886 HOLLANDALE WI
— 608-968 7XXX which blocks → BRIGHTSPEED OF CENTRAL WISCONSIN, LLC 1159 WIOTA WI
— 608-976 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WI
— 608-979 0XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H VIROQUA WI
— 608-981 0XXX1XXX3XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → FRONTIER NORTH INC. - WI 0886 BRIGGSVL WI
— 608-983 not yet reported which blocks → LA VALLE TEL. COOP. 0899 CAZENOVIA WI
— 608-985 not yet reported which blocks → LA VALLE TEL. COOP. 0899 LA VALLE WI
— 608-986 0XXX1XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRONTIER NORTH INC. - WI 0886 LIME RIDGE WI
— 608-987 0XXX7XXX8XXX9XXX · 4 holders which blocks → FRONTIER NORTH INC. - WI 0886 MINERAL PT WI
— 608-988 none assigned yet which blocks → GRANTLAND TELECOM, INC. 0930 MOUNT HOPE WI
— 608-989 not yet reported which blocks → BRIGHTSPEED OF CENTRAL WISCONSIN, LLC 1159 BLAIR WI
— 608-994 5XXX7XXX9XXX · 3 holders which blocks → GRANTLAND TELECOM, INC. 0930 BLOOMINGTN WI
— 608-996 not yet reported which blocks → GRANTLAND TELECOM, INC. 0930 BAGLEY WI

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.