NumberResearch Membership · Data 09/24/2026

Recent prefix assignments

358 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026

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
2012-04-02 850-203 0–9 XXXall 10 · 6 holders which blocks → MCC TELEPHONY LLC 593K GULFBREEZE FL
2012-04-02 860-503 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HARTFORD CT
2012-04-02 902-955 not yet reported which blocks → TELUS Mobility 8303 Annapolis Royal —
2012-04-02 904-503 0–9 XXXall 10 · 2 holders which blocks → COMCAST IP PHONE, LLC 318J JACKSONVL FL
2012-03-30 314-502 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 ST LOUIS MO
2012-03-30 385-393 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - UT 117F CLEARFIELD UT
2012-03-30 405-774 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 OKLA CITY OK
2012-03-30 580-951 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 LAWTON OK
2012-03-30 585-441 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 ROCHESTER NY
2012-03-30 615-997 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 551G NASHVILLE TN
2012-03-30 619-361 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CHULAVISTA CA
2012-03-29 209-269 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 LODI CA
2012-03-29 845-448 0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → TC SYSTEMS, INC. - NY 7140 ROSENDALE NY
2012-03-29 901-249 0–9 XXXall 10 · 3 holders which blocks → AT&T ENTERPRISES, LLC 516C MEMPHIS TN
2012-03-28 289-724 not yet reported which blocks → Iristel Inc. 154E Cooksville —
2012-03-28 289-856 not yet reported which blocks → Fibernetics Corporation 464D Oakville —
2012-03-28 289-857 not yet reported which blocks → Fibernetics Corporation 464D Thornhill —
2012-03-28 289-861 not yet reported which blocks → Primus Telecommunications Canada Inc. 201A Burlington —
2012-03-28 289-862 not yet reported which blocks → Primus Telecommunications Canada Inc. 201A Milton —
2012-03-28 289-863 not yet reported which blocks → Primus Telecommunications Canada Inc. 201A Oakville —
2012-03-28 385-206 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 OGDEN UT
2012-03-28 435-316 none assigned yet which blocks → NAVAJO COMM CO INC - UT DBA NAVAJO COMM UT 4451 MONUMNTVLY UT
2012-03-28 504-413 0–9 XXXwhole prefix which blocks → VOICESTREAM GSM I, LLC 150C NEWORLEANS LA
2012-03-28 705-398 not yet reported which blocks → Bragg Communications Inc. 4878 Little Current —
2012-03-28 812-808 4XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J HELTONVL IN
2012-03-28 832-617 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F HSTNSUBURB TX
2012-03-27 336-493 0–9 XXXall 10 · 3 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 ASHEBORO NC
2012-03-27 469-282 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL TELEPHONE COMPANY - TX 7726 IRVING TX
2012-03-27 587-258 not yet reported which blocks → TELUS 8084 Fort McMurray —
2012-03-27 620-208 not yet reported which blocks → CABLE ONE VOIP, LLC 555G EMPORIA KS
2012-03-27 864-309 0–9 XXXall 10 · 4 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 ANDERSON SC
2012-03-27 872-206 0–9 XXXall 10 · 7 holders which blocks → COMCAST IP PHONE, LLC 318J CHICGOZN04 IL
2012-03-27 902-501 not yet reported which blocks → Aliant Telecom (NS) 8089 Halifax —
2012-03-27 902-503 not yet reported which blocks → Aliant Telecom (NS) 8089 Halifax —
2012-03-27 902-504 not yet reported which blocks → Aliant Telecom (NS) 8089 Yarmouth —
2012-03-27 902-507 not yet reported which blocks → Aliant Telecom (NS) 8089 New Glasgow —
2012-03-27 902-520 not yet reported which blocks → Aliant Telecom (NS) 8089 Halifax —
2012-03-26 434-829 0–9 XXXall 10 · 8 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F EMPORIA VA
2012-03-26 470-723 0–9 XXXall 10 · 2 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA NE GA
2012-03-26 470-767 0–9 XXXall 10 · 3 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA NE GA
2012-03-26 513-581 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2012-03-26 808-313 0–9 XXXall 10 · 4 holders which blocks → SERVPAC INCORPORATED - HI 517G HILO HI
2012-03-26 808-698 0–9 XXXall 10 · 4 holders which blocks → SERVPAC INCORPORATED - HI 517G LIHUE HI
2012-03-26 808-727 0–9 XXXall 10 · 6 holders which blocks → SERVPAC INCORPORATED - HI 517G WAILUKU HI
2012-03-26 830-770 0XXX1XXX6XXX7XXX8XXX · 3 holders which blocks → VTX COMMUNICATIONS, LLC 776A JOURDANTON TX
2012-03-26 830-771 0XXX2XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → VTX COMMUNICATIONS, LLC 776A CHARLOTTE TX
2012-03-26 918-206 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 TULSA OK
2012-03-23 289-536 not yet reported which blocks → Iristel Inc. 154E Woodbridge —
2012-03-23 289-914 not yet reported which blocks → Iristel Inc. 154E Streetsville —
2012-03-23 289-985 not yet reported which blocks → Iristel Inc. 154E Whitby —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.