NumberResearch Membership · Data 09/21/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026

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
8X8, INC. 38
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
— 260-959 not yet reported which blocks → IN
— 260-960 5XXX6XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J ROANOKE IN
— 260-969 not yet reported which blocks → PAETEC ITEL, LLC 829J FORT WAYNE IN
— 260-976 not yet reported which blocks → IN
— 260-982 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 NOMANCHETR IN
— 260-988 not yet reported which blocks → IN
— 260-995 1XXX2XXX3XXX5XXX6XXX7XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 UNIONDALE IN
— 260-997 2XXX3XXX4XXX5XXX7XXX9XXX · 5 holders which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 BRYANT IN
— 262-204 0XXX1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 CEDARBURG WI
— 262-206 none assigned yet which blocks → METROPCS, INC. 5562 BURLINGTON WI
— 262-207 4XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MILWAUKZN2 WI
— 262-208 1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 4 holders which blocks → METROPCS, INC. 5562 WEST BEND WI
— 262-210 none assigned yet which blocks → UNITED STATES CELLULAR - WI 6274 BURLINGTON WI
— 262-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WI
— 262-213 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 KENOSHA WI
— 262-215 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LAKEGENEVA WI
— 262-223 3XXX6XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J HARTFORD WI
— 262-224 none assigned yet which blocks → UNITED STATES CELLULAR - WI 6274 HARTFORD WI
— 262-228 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 CEDARBURG WI
— 262-231 not yet reported which blocks → SPOK, INC. 6630 LAKEGENEVA WI
— 262-235 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 PTWASHIGTN WI
— 262-236 5XXX6XXX7XXX9XXX · 2 holders which blocks → WISCONSIN BELL INC 9327 THIENSVL WI
— 262-238 3XXX which blocks → WISCONSIN BELL INC 9327 THIENSVL WI
— 262-240 4XXX6XXX7XXX8XXX · 3 holders which blocks → WISCONSIN BELL INC 9327 THIENSVL WI
— 262-241 not yet reported which blocks → WISCONSIN BELL INC 9327 THIENSVL WI
— 262-242 not yet reported which blocks → WISCONSIN BELL INC 9327 THIENSVL WI
— 262-243 not yet reported which blocks → WISCONSIN BELL INC 9327 THIENSVL WI
— 262-244 5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J OCONOMOWOC WI
— 262-245 3XXX which blocks → WISCONSIN BELL INC 9327 WILLIAMSBY WI
— 262-246 2XXX which blocks → WISCONSIN BELL INC 9327 SUSSEX WI
— 262-247 5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J WEST BEND WI
— 262-248 not yet reported which blocks → WISCONSIN BELL INC 9327 LAKEGENEVA WI
— 262-249 6XXX which blocks → WISCONSIN BELL INC 9327 LAKEGENEVA WI
— 262-250 not yet reported which blocks → WISCONSIN BELL INC 9327 MENOMONFLS WI
— 262-251 not yet reported which blocks → WISCONSIN BELL INC 9327 MENOMONFLS WI
— 262-252 9XXX which blocks → WISCONSIN BELL INC 9327 MENOMONFLS WI
— 262-253 not yet reported which blocks → WISCONSIN BELL INC 9327 MENOMONFLS WI
— 262-255 not yet reported which blocks → WISCONSIN BELL INC 9327 MENOMONFLS WI
— 262-257 9XXX which blocks → WISCONSIN BELL INC 9327 MENOMONFLS WI
— 262-260 8XXX9XXX · 2 holders which blocks → WISCONSIN BELL INC 9327 RACINE WI
— 262-261 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C PTWASHIGTN WI
— 262-264 5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J PEWAUKEE WI
— 262-268 not yet reported which blocks → WISCONSIN BELL INC 9327 PTWASHIGTN WI
— 262-269 0XXX1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 OCONOMOWOC WI
— 262-271 not yet reported which blocks → T-MOBILE USA, INC. 6529 WAUKESHA WI
— 262-275 4XXX7XXX · 2 holders which blocks → FRONTIER NORTH INC. - WI 0886 WALWORTH WI
— 262-279 1XXX4XXX7XXX8XXX · 2 holders which blocks → WISCONSIN BELL INC 9327 GENOA CITY WI
— 262-284 not yet reported which blocks → WISCONSIN BELL INC 9327 PTWASHIGTN WI
— 262-285 0XXX1XXX2XXX5XXX · 4 holders which blocks → FRONTIER NORTH INC. - WI 0886 BELGIUM WI
— 262-288 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - WI 007F BRISTOL WI

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.