NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

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

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
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 27
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
New assignments by month Oct 2026 Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025
Download CSV ↓
Quick find in this area code:
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2018-06-01 667-235 0–9 XXXall 10 · 4 holders which blocks → VONAGE AMERICA LLC 197D SALISBURY MD
2018-06-01 667-300 0–9 XXXall 10 · 3 holders which blocks → CORE COMMUNICATIONS, INC.- MD 2593 COLUMBIA MD
2018-06-01 667-336 0–9 XXXall 10 · 3 holders which blocks → CORE COMMUNICATIONS, INC.- MD 2593 BEL AIR MD
2018-06-01 667-500 0–9 XXXall 10 · 2 holders which blocks → CORE COMMUNICATIONS, INC.- MD 2593 ANNAPOLIS MD
2018-06-01 873-414 not yet reported which blocks → Distributel 083E Kazabazua —
2018-06-01 873-417 not yet reported which blocks → Distributel 083E Low —
2018-06-01 873-419 not yet reported which blocks → Distributel 083E Luskville —
2018-06-01 873-420 not yet reported which blocks → Distributel 083E Papineauville —
2018-06-01 873-421 not yet reported which blocks → Distributel 083E Perkins —
2018-06-01 873-422 not yet reported which blocks → Distributel 083E Quyon —
2018-06-01 873-423 not yet reported which blocks → Distributel 083E St-Pierre-de-Wakefield —
2018-06-01 873-424 not yet reported which blocks → Distributel 083E Thurso —
2018-06-01 873-431 not yet reported which blocks → Distributel 083E Montebello —
2018-06-01 873-432 not yet reported which blocks → Distributel 083E Wakefield —
2018-06-01 959-456 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CT 199F CANTERBURY CT
2018-05-31 343-256 not yet reported which blocks → Distributel 082E Crysler —
2018-05-31 343-257 not yet reported which blocks → Distributel 082E Merrickville —
2018-05-31 343-258 not yet reported which blocks → Distributel 082E Pakenham —
2018-05-31 343-259 not yet reported which blocks → Distributel 082E South Mountain —
2018-05-31 515-901 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2018-05-31 612-393 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TWINCITIES MN
2018-05-31 667-277 0–9 XXXwhole prefix which blocks → CORE COMMUNICATIONS, INC.- MD 2593 SHERWD FOR MD
2018-05-31 831-220 0–9 XXXall 10 · 4 holders which blocks → VONAGE AMERICA LLC 197D MONTEREY CA
2018-05-31 873-416 not yet reported which blocks → Distributel 083E Gatineau —
2018-05-31 873-427 not yet reported which blocks → Distributel 083E Fort-Coulonge —
2018-05-31 873-428 not yet reported which blocks → Distributel 083E Gracefield —
2018-05-31 873-429 not yet reported which blocks → Distributel 083E Grand-Remous —
2018-05-31 959-201 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CT 7143 NEW LONDON CT
2018-05-30 307-489 8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SHIRLEBSIN WY
2018-05-30 325-326 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - TX 903C ANSON TX
2018-05-30 325-335 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C HAMLIN TX
2018-05-30 325-399 0XXX1XXX2XXX3XXX4XXX6XXX7XXX9XXX · 2 holders which blocks → ONVOY, LLC - TX 903C STAMFORD TX
2018-05-30 325-425 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - TX 903C ROBY TX
2018-05-30 470-898 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2018-05-30 470-990 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2018-05-30 515-587 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2018-05-30 571-347 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN08 VA
2018-05-30 581-785 not yet reported which blocks → Bell Canada 984C Portneuf —
2018-05-30 581-786 not yet reported which blocks → Bell Canada 984C Saint-Adelphe —
2018-05-30 581-788 not yet reported which blocks → Bell Canada 984C Saint-Augustin —
2018-05-30 581-789 not yet reported which blocks → Bell Canada 984C Saint-Basile —
2018-05-30 581-790 not yet reported which blocks → Bell Canada 984C Saint-Casimir —
2018-05-30 581-791 not yet reported which blocks → Bell Canada 984C Sainte-Thecle —
2018-05-30 581-792 not yet reported which blocks → Bell Canada 984C Saint-Marc-des-Carrieres —
2018-05-30 581-793 not yet reported which blocks → Bell Canada 984C Saint-Raymond —
2018-05-30 581-794 not yet reported which blocks → Bell Canada 984C Saint-Stanislas —
2018-05-30 581-795 not yet reported which blocks → Bell Canada 984C Saint-Ubalde —
2018-05-30 607-308 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VONAGE AMERICA LLC 197D BINGHAMTON NY
2018-05-30 786-604 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MIAMI FL
2018-05-30 816-705 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MO 093F KANSASCITY MO

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.