NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026

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. 39
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
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
Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2011-12-13 917-870 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 NWYRCYZN03 NY
2011-12-13 949-332 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CAPITRNVLY CA
2011-12-12 206-643 0–9 XXXall 10 · 2 holders which blocks → NUSO, LLC 551G SEATTLE WA
2011-12-12 501-712 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
2011-12-12 541-214 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - OR 750E EUGENE OR
2011-12-12 701-353 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - ND 452F FARGO ND
2011-12-12 719-426 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CO 026D COLORDOSPG CO
2011-12-12 720-428 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CO 026D DENVER CO
2011-12-12 786-414 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MIAMI FL
2011-12-12 971-202 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - OR 750E PORTLAND OR
2011-12-09 202-304 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSHNGTNZN1 DC
2011-12-09 289-435 not yet reported which blocks → ISP Telecom Inc. 4727 Cobourg —
2011-12-09 289-436 not yet reported which blocks → ISP Telecom Inc. 4727 Port Hope —
2011-12-09 289-877 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Hamilton —
2011-12-09 289-920 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Hamilton —
2011-12-09 404-599 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA GA
2011-12-09 470-244 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 ATLANTA NE GA
2011-12-09 470-262 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 ATLANTA NE GA
2011-12-09 507-405 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - MN 184D ROCHESTER MN
2011-12-09 510-447 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 RICHMOND CA
2011-12-09 540-613 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 ROANOKE VA
2011-12-09 540-835 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 RADFORD VA
2011-12-09 587-886 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Calgary —
2011-12-09 587-890 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Calgary —
2011-12-09 612-254 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MN 184D TWINCITIES MN
2011-12-09 617-936 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J BOSTON MA
2011-12-09 712-459 0XXX1XXX2XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 HARTLEY IA
2011-12-09 717-925 0–9 XXXall 10 · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LANCASTER PA
2011-12-09 757-793 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 NRFOLKZON2 VA
2011-12-09 775-301 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NV 6458 CARSONCITY NV
2011-12-09 804-548 0–9 XXXall 10 · 5 holders which blocks → VERIZON VIRGINIA, INC. 9213 RICHMOND VA
2011-12-09 812-203 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IN 7440 PAOLI IN
2011-12-08 516-519 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NASSAUZN02 NY
2011-12-08 530-847 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C ALTA CA
2011-12-08 774-304 0–9 XXXall 10 · 7 holders which blocks → PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F STURBRIDGE MA
2011-12-08 971-201 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR
2011-12-07 406-414 0–9 XXXall 10 · 3 holders which blocks → QWEST CORPORATION 9636 BOZEMAN MT
2011-12-07 413-234 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 SPRINGFLD MA
2011-12-07 517-836 0–9 XXXall 10 · 7 holders which blocks → CLEAR RATE COMMUNICATIONS, LLC 046L EATON RPD MI
2011-12-07 534-220 0–9 XXXall 10 · 3 holders which blocks → AT&T ENTERPRISES, LLC 516C CHIPPEWFLS WI
2011-12-07 910-898 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J ROBBINS NC
2011-12-07 919-892 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J OXFORD NC
2011-12-07 970-707 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K GUNNISON CO
2011-12-06 203-456 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 DANBURY CT
2011-12-06 203-836 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2011-12-06 207-500 0–9 XXXall 10 · 6 holders which blocks → BELL ATLANTIC MOBILE, INC 6386 LIVERMRFLS ME
2011-12-06 226-937 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Brantford —
2011-12-06 226-938 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Brantford —
2011-12-06 330-915 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CANTON OH
2011-12-06 334-698 0–9 XXXall 10 · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K WICKSBURG AL

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.