NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

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. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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
— 574-946 1XXX8XXX9XXX · 3 holders which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 WINAMAC IN
— 574-948 1XXX which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 PLYMOUTH IN
— 574-950 not yet reported which blocks → IN
— 574-952 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ARGOS IN
— 574-958 not yet reported which blocks → IN
— 574-959 not yet reported which blocks → IN
— 574-965 not yet reported which blocks → YEOMAN TEL. CO., INC. 0839 YEOMAN IN
— 574-966 5XXX6XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J BRISTOL IN
— 574-967 not yet reported which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 FLORA IN
— 574-968 not yet reported which blocks → PAETEC ITEL, LLC 829J SOUTH BEND IN
— 574-970 not yet reported which blocks → PAETEC ITEL, LLC 829J ELKHART IN
— 574-976 not yet reported which blocks → IN
— 574-993 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SOUTH BEND IN
— 575-202 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 LAS CRUCES NM
— 575-208 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NM 5470 ROSWELL NM
— 575-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT NM
— 575-222 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J LAS CRUCES NM
— 575-225 not yet reported which blocks → LEACO RURAL TEL. COOP., INC. 2264 ANTLPE RDG NM
— 575-226 not yet reported which blocks → YUCCA TELECOMM SYSTEMS, INC., DBA YUCCA COMM-NM 2350 PORTALES NM
— 575-231 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 ARTESIA NM
— 575-233 6XXX7XXX8XXX · 2 holders which blocks → QWEST CORPORATION 9636 LA MESA NM
— 575-234 not yet reported which blocks → VALOR TELECOM TX,LP-NM #1 DBA WINDSTREAM COMM SW 1164 CARLSBAD NM
— 575-235 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - NM 206F CHAMA NM
— 575-236 4XXX which blocks → VALOR TELECOM TX,LP-NM #1 DBA WINDSTREAM COMM SW 1164 CARLSBAD NM
— 575-253 not yet reported which blocks → ROOSEVELT COUNTY RURAL TEL. COOP., INC. 2272 MELROSE NM
— 575-257 not yet reported which blocks → VALOR TELECOM TX,LP-NM #2 DBA WINDSTREAM COMM SW 1193 RUIDOSO NM
— 575-258 not yet reported which blocks → VALOR TELECOM TX,LP-NM #2 DBA WINDSTREAM COMM SW 1193 RUIDOSO NM
— 575-262 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - NM 206F ANTHONY NM
— 575-267 2XXX6XXX7XXX · 3 holders which blocks → QWEST CORPORATION 9636 HATCH NM
— 575-273 not yet reported which blocks → ROOSEVELT COUNTY RURAL TEL. COOP., INC. 2272 CAUSEY NM
— 575-274 not yet reported which blocks → ROOSEVELT COUNTY RURAL TEL. COOP., INC. 2272 ELIDA NM
— 575-276 not yet reported which blocks → ROOSEVELT COUNTY RURAL TEL. COOP., INC. 2272 ARCH NM
— 575-278 not yet reported which blocks → BACA VALLEY TEL. CO., INC. 2259 DES MOINES NM
— 575-279 not yet reported which blocks → E.N.M.R. TEL COOP 2262 HOUSE NM
— 575-289 not yet reported which blocks → VALOR TELECOM TX,LP-NM #2 DBA WINDSTREAM COMM SW 1193 CUBA NM
— 575-297 0XXX1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - NM 123F TRUTHCQNCS NM
— 575-303 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NM 123F RATON NM
— 575-305 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NM 206F SNA TERESA NM
— 575-308 0XXX2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 ARTESIA NM
— 575-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT NM
— 575-336 not yet reported which blocks → VALOR TELECOM TX,LP-NM #2 DBA WINDSTREAM COMM SW 1193 ALTO NM
— 575-337 not yet reported which blocks → VALOR TELECOM TX,LP-NM #1 DBA WINDSTREAM COMM SW 1164 HOBBS NM
— 575-347 1XXX6XXX8XXX · 3 holders which blocks → QWEST CORPORATION 9636 ROSWELL NM
— 575-354 not yet reported which blocks → VALOR TELECOM TX,LP-NM #2 DBA WINDSTREAM COMM SW 1193 CAPITAN NM
— 575-355 not yet reported which blocks → E.N.M.R. TEL COOP 2262 FORTSUMNER NM
— 575-356 not yet reported which blocks → QWEST CORPORATION 9636 PORTALES NM
— 575-357 not yet reported which blocks → E.N.M.R. TEL COOP 2262 GRADY NM
— 575-358 not yet reported which blocks → VALLEY TEL COOP INC 2176 VIRDEN NM
— 575-359 5XXX7XXX · 2 holders which blocks → QWEST CORPORATION 9636 PORTALES NM
— 575-364 not yet reported which blocks → PENASCO VALLEY TEL. COOP., INC. 2270 COTTONWOOD NM

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.