NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

337 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 25
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 12
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
2021-11-12 579-580 not yet reported which blocks → IXICA Communications Inc. 812H Waterloo —
2021-11-12 602-846 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H PHOENIX AZ
2021-11-12 602-880 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2021-11-12 608-601 0XXX1XXX2XXX4XXX8XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - WI 007F MCFARLAND WI
2021-11-12 623-279 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H PHOENIX AZ
2021-11-12 640-216 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NJ 118F CRANBURY NJ
2021-11-12 640-217 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NJ 118F CAPMAYCTHS NJ
2021-11-12 661-539 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H MCFARLAND CA
2021-11-12 661-581 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 PLDL PLDL CA
2021-11-12 681-396 7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MARLINTON WV
2021-11-12 681-413 1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HILLSBORO WV
2021-11-12 720-896 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 DENVER CO
2021-11-12 769-276 0–9 XXXall 10 · 4 holders which blocks → POWERTEL MEMPHIS LICENSES, INC. 7474 MCCOMB MS
2021-11-12 845-874 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 MAHOPAC NY
2021-11-12 862-390 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 NEWARK NJ
2021-11-12 908-545 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LINDEN NJ
2021-11-12 939-323 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 AGUADILLA PR
2021-11-12 939-729 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → SUNCOM DBA T-MOBILE USA 8645 ARROYO PR
2021-11-12 980-401 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 GASTONIA NC
2021-11-12 984-480 0–9 XXXall 10 · 3 holders which blocks → COMMIO, LLC 939H RALEIGH NC
2021-11-11 256-941 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DECATUR AL
2021-11-11 325-299 0XXX1XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H STAMFORD TX
2021-11-11 325-306 0XXX1XXX6XXX8XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H ROTAN TX
2021-11-11 440-902 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H ELYRIA OH
2021-11-11 806-812 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H MCLEAN TX
2021-11-11 806-813 0XXX1XXX2XXX7XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H ALLISON TX
2021-11-11 945-235 0–9 XXXall 10 · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J DALLAS TX
2021-11-10 213-601 0–9 XXXwhole prefix which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2021-11-10 213-641 0–9 XXXall 10 · 2 holders which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 13 CA
2021-11-10 385-503 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - UT 871E BOUNTIFUL UT
2021-11-10 424-463 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 INGLEWOOD CA
2021-11-10 480-846 0–9 XXXwhole prefix which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2021-11-10 520-590 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 BISBEE AZ
2021-11-10 540-304 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - VA 138E REMINGTON VA
2021-11-10 540-963 0XXX1XXX2XXX5XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC - VA 138E TROUTVILLE VA
2021-11-10 548-477 not yet reported which blocks → IXICA Communications Inc. 812H Galt —
2021-11-10 548-510 not yet reported which blocks → IXICA Communications Inc. 812H Ayr —
2021-11-10 548-580 not yet reported which blocks → IXICA Communications Inc. 812H Elmira —
2021-11-10 548-708 not yet reported which blocks → Iristel Inc. 154E Windsor —
2021-11-10 548-709 not yet reported which blocks → Iristel Inc. 154E Windsor —
2021-11-10 616-362 0XXX1XXX2XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E MOLINE MI
2021-11-10 657-539 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2021-11-10 742-999 not yet reported which blocks → TELUS Mobility 8303 Hamilton —
2021-11-10 747-308 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BRBN BRBN CA
2021-11-10 757-734 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F NRFOLKZON2 VA
2021-11-10 951-594 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 MORENO CA
2021-11-10 980-361 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 CHARLOTTE NC
2021-11-09 209-865 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E GALT CA
2021-11-09 209-925 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C SNRA MAIN CA
2021-11-09 351-227 2XXX3XXX4XXX5XXX7XXX · 3 holders which blocks → ONVOY, LLC - MA 892D BOLTON MA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.