NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

358 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 31
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
ONVOY, LLC - NJ 15
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
2011-11-02 502-504 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ZONETON KY
2011-11-02 505-484 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → VALOR TELECOM TX,LP-NM #2 DBA WINDSTREAM COMM SW 1193 ESPANOLA NM
2011-11-02 570-665 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 TUNKHANNCK PA
2011-11-02 604-243 not yet reported which blocks → Iristel Inc. 154E North Vancouver —
2011-11-02 605-952 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - SD 106F ELK POINT SD
2011-11-02 786-503 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 MIAMI FL
2011-11-02 918-849 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TULSA OK
2011-11-01 240-712 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL238 MD
2011-11-01 306-713 not yet reported which blocks → TELUS Mobility 8303 Saskatoon —
2011-11-01 331-207 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IL 6115 YORKVILLE IL
2011-11-01 339-202 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LEXINGTON MA
2011-11-01 423-281 0–9 XXXall 10 · 3 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K BUTLER TN
2011-11-01 587-259 not yet reported which blocks → TELUS 8084 Grande Prairie —
2011-11-01 587-322 not yet reported which blocks → TELUS Mobility 8301 Camrose —
2011-11-01 716-265 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → IDT AMERICA, CORP. - NY 211C SALAMANCA NY
2011-11-01 778-850 not yet reported which blocks → ISP Telecom Inc. 4727 Cloverdale —
2011-11-01 819-550 not yet reported which blocks → TELUS Mobility 8303 Val-D'Or —
2011-11-01 819-995 not yet reported which blocks → TELUS Mobility 8303 Trois-Rivieres —
2011-11-01 870-340 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JONESBORO AR
2011-11-01 917-436 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN07 NY
2011-10-31 240-630 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN2 MD
2011-10-31 405-655 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 OKLA CITY OK
2011-10-31 614-512 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 COLUMBUS OH
2011-10-31 720-474 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 DENVER CO
2011-10-31 731-201 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TN 124F BIG SANDY TN
2011-10-28 226-646 not yet reported which blocks → Distributel 082E Kitchener-Waterloo —
2011-10-28 289-675 not yet reported which blocks → TELUS Mobility 8303 Oshawa —
2011-10-28 289-691 not yet reported which blocks → TELUS Mobility 8303 Cobourg —
2011-10-28 289-974 not yet reported which blocks → Distributel 082E St. Catharines-Thorold —
2011-10-28 415-583 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2011-10-28 469-262 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 IRVING TX
2011-10-28 506-259 not yet reported which blocks → TELUS Mobility 8303 Fredericton —
2011-10-28 581-230 not yet reported which blocks → TELUS Mobility 8303 Alma —
2011-10-28 581-990 not yet reported which blocks → TELUS Mobility 8303 Quebec —
2011-10-28 843-508 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - SC 077F ROWLAND SC
2011-10-27 636-649 0–9 XXXall 10 · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 UNION MO
2011-10-27 937-504 0–9 XXXall 10 · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C SPRINGFLD OH
2011-10-26 337-419 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LK CHARLES LA
2011-10-26 407-202 0–9 XXXall 10 · 2 holders which blocks → METROPCS NETWORKS, LLC 899D ORLANDO FL
2011-10-26 423-882 0–9 XXXwhole prefix which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 CHATTNOOGA TN
2011-10-26 470-295 0–9 XXXall 10 · 2 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA NE GA
2011-10-26 562-270 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LONG BEACH CA
2011-10-26 614-401 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DUBLIN OH
2011-10-26 786-209 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MIAMI FL
2011-10-26 813-252 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - FL 937C TAMPACEN FL
2011-10-26 843-501 0–9 XXXall 10 · 3 holders which blocks → AT&T ENTERPRISES, LLC 516C CHARLESTON SC
2011-10-25 226-343 not yet reported which blocks → TELUS Mobility 8303 Guelph —
2011-10-25 226-349 not yet reported which blocks → TELUS Mobility 8303 Sarnia —
2011-10-25 412-339 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 PTTSBGZON1 PA
2011-10-25 581-624 not yet reported which blocks → TELUS Mobility 8303 Rimouski —

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.