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
2019-03-06 531-521 0XXX3XXX4XXX5XXX · 2 holders which blocks → ONVOY, LLC - NE 549E DAVEY NE
2019-03-06 531-533 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - NE 549E GUIDE ROCK NE
2019-03-06 636-330 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF MISSOURI, LLC - MO 225F DE SOTO MO
2019-03-06 681-266 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 KEYSER WV
2019-03-06 873-625 not yet reported which blocks → Cooptel 818D L'Avenir —
2019-03-06 873-626 not yet reported which blocks → Cooptel 818D Wickham —
2019-03-06 873-627 not yet reported which blocks → Cooptel 818D St-Guillaume —
2019-03-05 236-968 not yet reported which blocks → TELUS Mobility 8301 Trail —
2019-03-05 435-271 0XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PEERLESS NETWORK OF UTAH, LLC - UT 526H SALINA UT
2019-03-05 435-289 0–9 XXXall 10 · 7 holders which blocks → PEERLESS NETWORK OF UTAH, LLC - UT 526H RICHFIELD UT
2019-03-05 475-739 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WOLCOTT CT
2019-03-05 540-766 1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 NATURALBDG VA
2019-03-05 804-606 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G BOWLNGGREN VA
2019-03-05 825-989 not yet reported which blocks → TELUS Mobility 8301 Red Deer —
2019-03-05 850-772 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 PANAMACITY FL
2019-03-05 850-782 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 TALLAHASSE FL
2019-03-05 914-369 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 WSCHSTZN01 NY
2019-03-05 984-477 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF NORTH CAROLINA, LLC - NC 350F CARY NC
2019-03-04 208-213 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - ID 808G ALBENI ID
2019-03-04 225-825 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - LA 749E NO CORNOR LA
2019-03-04 229-829 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - GA 067D MOULTRIE GA
2019-03-04 236-970 not yet reported which blocks → TELUS Mobility 8301 Kelowna —
2019-03-04 406-919 0–9 XXXall 10 · 4 holders which blocks → TERRA NOVA TELECOM INC. 145J BELGRADE MT
2019-03-04 506-889 not yet reported which blocks → TELUS Mobility 8303 Moncton —
2019-03-04 573-843 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 CARUTHRSVL MO
2019-03-04 701-507 0–9 XXXwhole prefix which blocks → LTE WIRELESS, INC. - ND 410J ROLETTE ND
2019-03-04 707-316 0–9 XXXall 10 · 8 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DIXON CA
2019-03-04 737-256 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2019-03-04 989-877 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TERRA NOVA TELECOM INC. 145J SAGINAW MI
2019-03-01 412-815 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F PTTSBGZON1 PA
2019-03-01 463-800 0–9 XXXall 10 · 3 holders which blocks → TERRA NOVA TELECOM INC. 145J INDIANAPLS IN
2019-03-01 470-457 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2019-03-01 484-630 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F W CHESTER PA
2019-03-01 616-273 0XXX1XXX2XXX4XXX5XXX7XXX9XXX · 3 holders which blocks → PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G MARNE MI
2019-03-01 737-255 0–9 XXXall 10 · 5 holders which blocks → EXIANT COMMUNICATIONS LLC 114J AUSTIN TX
2019-03-01 786-669 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MIAMI FL
2019-03-01 854-203 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA SC- LLC 635C KINGSTREE SC
2019-03-01 856-450 0–9 XXXall 10 · 5 holders which blocks → EXIANT COMMUNICATIONS LLC 114J BEAVER BRK NJ
2019-03-01 862-339 0–9 XXXall 10 · 4 holders which blocks → EXIANT COMMUNICATIONS LLC 114J NEWARK NJ
2019-02-28 385-302 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT
2019-02-28 469-695 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL 9533 DALLAS TX
2019-02-28 616-385 0XXX1XXX3XXX8XXX9XXX · 5 holders which blocks → PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G KENT CITY MI
2019-02-28 757-916 0–9 XXXall 10 · 4 holders which blocks → EXIANT COMMUNICATIONS LLC 114J NRFOLKZON2 VA
2019-02-28 802-308 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VT 9450 FAIR HAVEN VT
2019-02-28 804-575 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F BETHIA VA
2019-02-28 804-664 0–9 XXXall 10 · 3 holders which blocks → EXIANT COMMUNICATIONS LLC 114J RICHMOND VA
2019-02-28 813-556 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPACEN FL
2019-02-28 816-601 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MO 993E KANSASCITY MO
2019-02-28 858-290 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 DEL MAR CA
2019-02-28 910-517 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - NC 638E ROCKINGHAM NC

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.