NumberResearch Membership · Data 09/22/2026

Recent prefix assignments

354 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026

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
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 20
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
2011-06-09 901-220 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 MEMPHIS TN
2011-06-08 206-512 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2011-06-08 207-274 0–9 XXXall 10 · 6 holders which blocks → BELL ATLANTIC MOBILE, INC 6386 PORTLAND ME
2011-06-08 213-976 not yet reported which blocks → NORTH COUNTY COMMUNICATION CORPORATION - CA 7894 LSAN DA 01 CA
2011-06-08 226-212 not yet reported which blocks → Iristel Inc. 154E St. Thomas —
2011-06-08 229-565 0–9 XXXwhole prefix which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 ALBANY GA
2011-06-08 248-392 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 PONTIAC MI
2011-06-08 252-302 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 MOYOCK NC
2011-06-08 310-976 not yet reported which blocks → NORTH COUNTY COMMUNICATION CORPORATION - CA 7894 BEVERLYHLS CA
2011-06-08 323-976 not yet reported which blocks → NORTH COUNTY COMMUNICATION CORPORATION - CA 7894 LSAN DA 14 CA
2011-06-08 347-947 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN05 NY
2011-06-08 347-957 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN06 NY
2011-06-08 347-977 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN07 NY
2011-06-08 347-997 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN10 NY
2011-06-08 402-739 0–9 XXXall 10 · 6 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 OMAHA NE
2011-06-08 408-976 not yet reported which blocks → NORTH COUNTY COMMUNICATION CORPORATION - CA 7894 XXXXXXXXXX CA
2011-06-08 415-976 not yet reported which blocks → NORTH COUNTY COMMUNICATION CORPORATION - CA 7894 SNFC CNTRL CA
2011-06-08 504-221 0–9 XXXall 10 · 5 holders which blocks → VOICESTREAM GSM I, LLC 150C KENNER LA
2011-06-08 510-976 not yet reported which blocks → NORTH COUNTY COMMUNICATION CORPORATION - CA 7894 OKLD BKLY CA
2011-06-08 609-349 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 TRENTON NJ
2011-06-08 619-976 not yet reported which blocks → NORTH COUNTY COMMUNICATION CORPORATION - CA 7894 SNDG SNDG CA
2011-06-08 626-976 not yet reported which blocks → NORTH COUNTY COMMUNICATION CORPORATION - CA 7894 ALHAMBRA CA
2011-06-08 646-937 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN01 NY
2011-06-08 702-706 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - NV 075F LAS VEGAS NV
2011-06-08 702-724 0–9 XXXall 10 · 3 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LAS VEGAS NV
2011-06-08 705-821 not yet reported which blocks → Fido Solutions Inc. 8820 Lindsay —
2011-06-08 707-978 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 SANTA ROSA CA
2011-06-08 716-248 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BUFFALO NY
2011-06-08 778-264 not yet reported which blocks → Zayo Canada Inc. 8304 North Vancouver —
2011-06-08 818-976 not yet reported which blocks → NORTH COUNTY COMMUNICATION CORPORATION - CA 7894 VAN NUYS CA
2011-06-08 862-232 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 PASSAIC NJ
2011-06-08 914-352 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7650 YORKTN HTS NY
2011-06-07 204-707 not yet reported which blocks → Westman Media Cooperative Ltd 120F Virden —
2011-06-07 415-906 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2011-06-07 450-453 not yet reported which blocks → Distributel 083E Pont-Viau —
2011-06-07 581-317 not yet reported which blocks → Distributel 083E Quebec —
2011-06-07 581-318 not yet reported which blocks → Distributel 083E Quebec —
2011-06-07 587-977 not yet reported which blocks → Distributel 081E Calgary —
2011-06-07 587-978 not yet reported which blocks → Distributel 081E Calgary —
2011-06-07 604-424 not yet reported which blocks → Distributel 081E Vancouver —
2011-06-07 613-778 not yet reported which blocks → Distributel 082E Ottawa-Hull —
2011-06-07 613-916 not yet reported which blocks → Distributel 082E Ottawa-Hull —
2011-06-07 613-917 not yet reported which blocks → Distributel 082E Ottawa-Hull —
2011-06-07 682-220 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 ARLINGTON TX
2011-06-06 352-282 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 OCALA FL
2011-06-06 609-342 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J BEACHHAVEN NJ
2011-06-03 208-901 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - ID 678B BOISE ID
2011-06-03 314-499 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MO 993E ST LOUIS MO
2011-06-03 414-639 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 MILWAUKZN1 WI
2011-06-03 425-505 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.