NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

337 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 25
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 12
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
2011-12-16 778-286 not yet reported which blocks → Bell West Inc. 2933 Yarrow —
2011-12-16 778-287 not yet reported which blocks → Bell West Inc. 2933 Sardis —
2011-12-16 778-289 not yet reported which blocks → Bell West Inc. 2933 Fort Langley —
2011-12-16 778-402 not yet reported which blocks → Iristel Inc. 154E Victoria —
2011-12-14 208-789 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - ID 689F BOISE ID
2011-12-14 226-270 not yet reported which blocks → Iristel Inc. 154E London —
2011-12-14 385-215 0–9 XXXall 10 · 6 holders which blocks → NUSO, LLC 551G SALT LAKE UT
2011-12-14 401-479 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - RI 6389 PROVIDENCE RI
2011-12-14 401-601 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - RI 6389 PROVIDENCE RI
2011-12-14 613-901 not yet reported which blocks → Bell Canada 8051 Ottawa-Hull —
2011-12-14 613-904 not yet reported which blocks → Bell Canada 8051 Ottawa-Hull —
2011-12-14 709-701 not yet reported which blocks → Iristel Inc. 154E St. John's —
2011-12-14 709-702 not yet reported which blocks → Iristel Inc. 154E St. John's —
2011-12-14 775-360 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NV 4805 RENO NV
2011-12-14 801-441 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - UT 871E SALT LAKE UT
2011-12-13 201-630 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 JERSEYCITY NJ
2011-12-13 201-904 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 WYCKOFF NJ
2011-12-13 205-209 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 BIRMINGHAM AL
2011-12-13 276-288 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WOOLWINE VA
2011-12-13 289-827 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Hamilton —
2011-12-13 352-203 0–9 XXXall 10 · 8 holders which blocks → METROPCS, INC. 5562 BELLEVIEW FL
2011-12-13 405-675 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
2011-12-13 418-437 not yet reported which blocks → Telecommunications Xittel Inc 247F Chicoutimi —
2011-12-13 504-563 0–9 XXXwhole prefix which blocks → VOICESTREAM GSM I, LLC 150C NEWORLEANS LA
2011-12-13 516-514 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 NASSAUZN02 NY
2011-12-13 581-265 not yet reported which blocks → Telecommunications Xittel Inc 247F Alma —
2011-12-13 587-956 not yet reported which blocks → TELUS 8084 Calgary —
2011-12-13 862-231 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 NEWARK NJ
2011-12-13 917-768 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN01 NY
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

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.