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
Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2016-01-28 734-228 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PLYMOUTH MI
2016-01-28 860-300 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWICH CT
2016-01-28 873-220 not yet reported which blocks → Distributel 083E Trois-Rivieres —
2016-01-28 984-207 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - NC 638E GOLDSBORO NC
2016-01-27 252-351 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC 7835 GREENVILLE NC
2016-01-27 343-998 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Ottawa-Hull —
2016-01-27 343-999 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Ottawa-Hull —
2016-01-27 365-404 not yet reported which blocks → Distributel 082E Newcastle —
2016-01-27 365-405 not yet reported which blocks → Distributel 082E Newtonville —
2016-01-27 365-406 not yet reported which blocks → Distributel 082E Orono —
2016-01-27 365-407 not yet reported which blocks → Distributel 082E Port Perry —
2016-01-27 365-408 not yet reported which blocks → Distributel 082E Blackstock —
2016-01-27 365-777 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Oakville —
2016-01-27 438-922 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Montreal —
2016-01-27 438-923 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Montreal —
2016-01-27 438-925 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Montreal —
2016-01-27 484-869 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J READING PA
2016-01-27 580-954 0–9 XXXall 10 · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA OK - LLC 530C ALTUS OK
2016-01-27 587-386 not yet reported which blocks → Bragg Communications Inc. 4878 Camrose —
2016-01-27 587-451 not yet reported which blocks → TELUS 8084 Barrhead —
2016-01-27 587-491 not yet reported which blocks → TELUS 8084 Cold Lake —
2016-01-27 587-492 not yet reported which blocks → TELUS 8084 Lloydminster —
2016-01-27 602-668 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-01-27 602-737 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2016-01-27 646-603 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J NWYRCYZN01 NY
2016-01-27 858-203 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - CA 649C LA JOLLA CA
2016-01-26 365-401 not yet reported which blocks → Distributel 082E Bowmanville —
2016-01-26 365-402 not yet reported which blocks → Distributel 082E Brooklin —
2016-01-26 365-403 not yet reported which blocks → Distributel 082E Hampton —
2016-01-26 626-314 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PSDN PSDN CA
2016-01-26 909-365 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FONTANA CA
2016-01-26 949-520 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 NEWPORTBCH CA
2016-01-25 306-807 not yet reported which blocks → Bell Mobility 6574 Regina —
2016-01-25 320-261 2XXX5XXX · 2 holders which blocks → MIDCONTINENT COMMUNICATIONS - MN 429A ANNANDALE MN
2016-01-25 365-888 not yet reported which blocks → Fido Solutions Inc. 5643 Hamilton —
2016-01-25 567-789 not yet reported which blocks → WABASH MUTUAL TELEPHONE COMPANY - OH 669D ROCKFORD OH
2016-01-25 608-591 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 LODI WI
2016-01-25 657-290 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ANA CA
2016-01-25 657-322 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ANA CA
2016-01-25 867-991 not yet reported which blocks → Iristel Inc. 154E Dawson City —
2016-01-25 904-293 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ST JOHNS FL
2016-01-25 907-290 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AK 9413 ANCHORAGE AK
2016-01-25 949-575 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SADLBK VLY CA
2016-01-25 956-403 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHARR TX
2016-01-22 336-690 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - NC 8389 GREENSBORO NC
2016-01-22 360-763 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 OLYMPIA WA
2016-01-22 470-548 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ATLANTA GA
2016-01-22 608-975 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 BELLEVILLE WI
2016-01-22 646-954 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 NWYRCYZN01 NY
2016-01-22 774-707 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 FRAMINGHAM MA

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.