NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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. 38
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
2010-08-03 701-687 1XXX which blocks → MIDCONTINENT COMMUNICATIONS - ND 3065 WILLOWCITY ND
2010-08-03 701-767 1XXX7XXX · 2 holders which blocks → MIDCONTINENT COMMUNICATIONS - ND 3065 BISBEE ND
2010-08-03 708-888 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E RIVERDALE IL
2010-08-03 904-428 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 JACKSONVL FL
2010-08-02 469-333 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F SEAGOVILLE TX
2010-08-02 646-474 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 NWYRCYZN01 NY
2010-08-02 914-230 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 WSCHSTZN01 NY
2010-08-02 931-820 0–9 XXXall 10 · 8 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K SANGO TN
2010-08-02 936-252 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 LIVINGSTON TX
2010-07-30 231-292 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K WHITEHALL MI
2010-07-30 407-476 0–9 XXXwhole prefix which blocks → PEERLESS NETWORK OF FLORIDA, LLC - FL 902E ORLANDO FL
2010-07-30 412-538 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7315 PTGSBNZN15 PA
2010-07-30 478-832 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 MACON GA
2010-07-30 603-814 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J SEABROOK NH
2010-07-30 618-504 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 WATERLOO IL
2010-07-30 719-626 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - CO 026D SALIDA CO
2010-07-30 815-681 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 OGLESBY IL
2010-07-29 226-523 not yet reported which blocks → Tuckersmith Communications Co-operative Ltd. 277E Blyth —
2010-07-29 226-889 not yet reported which blocks → Tuckersmith Communications Co-operative Ltd. 277E Brussels —
2010-07-29 347-378 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 NWYRCYZN06 NY
2010-07-29 581-640 not yet reported which blocks → Videotron Ltd. 8306 Petite-Riviere-St-Francois —
2010-07-29 581-641 not yet reported which blocks → Videotron Ltd. 8306 St-Urbain —
2010-07-29 607-366 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J LANSING NY
2010-07-29 847-857 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 ELGIN IL
2010-07-28 305-906 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 KEYS FL
2010-07-28 313-932 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN5 MI
2010-07-28 337-470 0–9 XXXwhole prefix which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 LAFAYETTE LA
2010-07-28 540-252 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 FRONTROYAL VA
2010-07-28 561-316 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 JUPITER FL
2010-07-28 571-762 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 MANASSAS VA
2010-07-28 612-266 0–9 XXXwhole prefix which blocks → QWEST CORPORATION 9631 TWINCITIES MN
2010-07-27 204-421 not yet reported which blocks → Shaw Telecom Inc. 497E Winnipeg —
2010-07-27 217-503 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRINGFLD IL
2010-07-27 218-598 0XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 1123 INTETNLFLS MN
2010-07-27 240-459 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL236 MD
2010-07-27 317-528 0–9 XXXall 10 · 2 holders which blocks → INDIANA BELL TEL CO INC 9325 GREENWOOD IN
2010-07-27 438-871 not yet reported which blocks → TELUS Mobility 8303 Montreal —
2010-07-27 438-872 not yet reported which blocks → TELUS Mobility 8303 Montreal —
2010-07-27 438-873 not yet reported which blocks → TELUS Mobility 8303 Montreal —
2010-07-27 438-874 not yet reported which blocks → TELUS Mobility 8303 Montreal —
2010-07-27 443-853 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BALTIMORE MD
2010-07-27 587-263 not yet reported which blocks → Bell West Inc. 2933 Brooks —
2010-07-27 587-264 not yet reported which blocks → Bell West Inc. 2933 Leduc —
2010-07-27 587-265 not yet reported which blocks → Bell West Inc. 2933 Westlock —
2010-07-27 717-882 0–9 XXXall 10 · 4 holders which blocks → D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 ELIZABTHVL PA
2010-07-27 778-275 not yet reported which blocks → Bell West Inc. 2933 Duncan —
2010-07-27 778-276 not yet reported which blocks → Bell West Inc. 2933 Gibsons —
2010-07-27 778-283 not yet reported which blocks → Bell West Inc. 2933 Salmon Arm —
2010-07-27 778-301 not yet reported which blocks → Bell West Inc. 2933 Port Alberni —
2010-07-27 802-622 0–9 XXXall 10 · 7 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K BARRE VT

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.