NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

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

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
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 27
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
New assignments by month Oct 2026 Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 515-941 not yet reported which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 PLEASANTVL IA
— 515-950 not yet reported which blocks → IA
— 515-953 8XXX9XXX · 2 holders which blocks → QWEST CORPORATION 9631 DES MOINES IA
— 515-955 not yet reported which blocks → FRONTIER COMMUNICATIONS OF IOWA, INC. 1127 FORT DODGE IA
— 515-956 not yet reported which blocks → QWEST CORPORATION 9631 AMES IA
— 515-957 1XXX2XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → QWEST CORPORATION 9631 DES MOINES IA
— 515-958 not yet reported which blocks → MULTIPLE OCN LISTING MULT IA
— 515-959 not yet reported which blocks → MULTIPLE OCN LISTING MULT IA
— 515-961 not yet reported which blocks → QWEST CORPORATION 9631 INDIANOLA IA
— 515-962 5XXX7XXX · 2 holders which blocks → QWEST CORPORATION 9631 INDIANOLA IA
— 515-963 2XXX5XXX6XXX · 2 holders which blocks → QWEST CORPORATION 9631 DES MOINES IA
— 515-964 not yet reported which blocks → QWEST CORPORATION 9631 DES MOINES IA
— 515-965 not yet reported which blocks → QWEST CORPORATION 9631 DES MOINES IA
— 515-966 3XXX4XXX5XXX8XXX · 3 holders which blocks → QWEST CORPORATION 9631 RUNNELLS IA
— 515-967 not yet reported which blocks → QWEST CORPORATION 9631 DES MOINES IA
— 515-968 not yet reported which blocks → WEBSTER-CALHOUN COOP. TEL. ASSN. 1328 PATON IA
— 515-971 none assigned yet which blocks → UNITED STATES CELLULAR - IA 6266 DES MOINES IA
— 515-972 1XXX2XXX3XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → FRONTIER COMMUNICATIONS OF IOWA, INC. 1127 OTHO IA
— 515-974 4XXX5XXX6XXX7XXX9XXX · 2 holders which blocks → QWEST CORPORATION 9631 DES MOINES IA
— 515-975 none assigned yet which blocks → UNITED STATES CELLULAR - IA 6266 DES MOINES IA
— 515-976 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IA
— 515-979 none assigned yet which blocks → UNITED STATES CELLULAR - IA 6266 DES MOINES IA
— 515-981 2XXX3XXX6XXX7XXX8XXX · 3 holders which blocks → QWEST CORPORATION 9631 DES MOINES IA
— 515-984 0XXX2XXX3XXX8XXX · 3 holders which blocks → QWEST CORPORATION 9631 POLK CITY IA
— 515-986 6XXX8XXX which blocks → QWEST CORPORATION 9631 DES MOINES IA
— 515-987 not yet reported which blocks → QWEST CORPORATION 9631 DES MOINES IA
— 515-988 none assigned yet which blocks → T-MOBILE USA, INC. 6529 DES MOINES IA
— 515-989 1XXX6XXX7XXX8XXX · 3 holders which blocks → QWEST CORPORATION 9631 DES MOINES IA
— 515-991 none assigned yet which blocks → T-MOBILE USA, INC. 6529 DES MOINES IA
— 515-992 0XXX2XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → QWEST CORPORATION 9631 DALLAS CTR IA
— 515-993 0XXX7XXX8XXX9XXX · 2 holders which blocks → QWEST CORPORATION 9631 ADEL IA
— 515-994 0XXX4XXX7XXX8XXX · 3 holders which blocks → QWEST CORPORATION 9631 PRAIRIE CY IA
— 515-996 0XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → QWEST CORPORATION 9631 VAN METER IA
— 515-999 0XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → QWEST CORPORATION 9631 GRANGER IA
— 516-200 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC- NY 384C NASSAUZN04 NY
— 516-203 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → TC SYSTEMS, INC. - NY 7140 NASSAUZN05 NY
— 516-204 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → METROPCS, INC. 5562 NASSAUZN03 NY
— 516-205 not yet reported which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NASSAUZN05 NY
— 516-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 516-213 4XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 NASSAUZN05 NY
— 516-214 1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 NASSAUZN05 NY
— 516-215 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-220 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN05 NY
— 516-221 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN09 NY
— 516-222 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-223 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN06 NY
— 516-224 0XXX1XXX2XXX4XXX5XXX6XXX8XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 COLDSPGHBR NY
— 516-225 not yet reported which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NASSAUZN02 NY
— 516-226 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NASSAUZN07 NY
— 516-227 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.