NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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, all time — NPA 213
PACIFIC BELL 138
T-MOBILE USA, INC. 120
ONVOY, LLC - CA 65
NEW CINGULAR WIRELESS PCS, LLC 58
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 44
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
2023-09-28 213-752 0–9 XXXwhole prefix which blocks → ONVOY, LLC - CA 649C LSAN DA 13 CA
2023-09-26 213-728 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2023-09-26 213-729 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 10 CA
2023-09-26 213-734 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2023-09-21 213-721 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 04 CA
2023-09-20 213-720 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C LSAN DA 06 CA
2023-09-19 213-698 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CA 649C LSAN DA 06 CA
2023-09-19 213-715 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CA 649C LSAN DA 13 CA
2023-09-19 213-719 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C MONTEBELLO CA
2023-08-17 213-329 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C LSAN DA 09 CA
2023-08-17 213-449 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C LSAN DA 05 CA
2023-08-17 213-579 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C LSAN DA 03 CA
2023-08-17 213-695 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C LSAN DA 14 CA
2023-08-17 213-697 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2023-08-10 213-665 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2023-07-13 213-301 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 07 CA
2023-07-13 213-313 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 13 CA
2023-05-17 213-664 0–9 XXXall 10 · 6 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J LSAN DA 12 CA
2023-05-09 213-662 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H LSAN DA 09 CA
2023-05-08 213-661 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2023-04-12 213-659 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C LSAN DA 09 CA
2023-04-07 213-606 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C LSAN DA 08 CA
2023-04-07 213-657 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C LSAN DA 13 CA
2023-04-07 213-658 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C LSAN DA 02 CA
2023-03-21 213-656 0–9 XXXall 10 · 3 holders which blocks → FIVE9, INC. 598J LSAN DA 01 CA
2023-02-02 213-636 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 LSAN DA 10 CA
2023-01-19 213-635 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 LSAN DA 04 CA
2023-01-11 213-619 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 10 CA
2022-10-28 213-691 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 07 CA
2022-10-28 213-696 0–9 XXXall 10 · 3 holders which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 07 CA
2022-10-21 213-714 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C LSAN DA 03 CA
2022-10-21 213-782 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C LSAN DA 14 CA
2022-10-18 213-686 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 11 CA
2022-10-18 213-838 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 05 CA
2022-10-18 213-916 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 14 CA
2022-09-16 213-684 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 LSAN DA 09 CA
2022-09-08 213-679 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 14 CA
2022-08-25 213-818 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H LSAN DA 06 CA
2022-07-14 213-682 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2022-06-29 213-609 0–9 XXXall 10 · 4 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LSAN DA 09 CA
2022-06-23 213-751 0–9 XXXall 10 · 3 holders which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 13 CA
2022-06-01 213-913 0–9 XXXall 10 · 4 holders which blocks → BARR TELL USA, LLC 026K LSAN DA 07 CA
2022-05-31 213-887 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H LSAN DA 10 CA
2022-05-27 213-571 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 10 CA
2022-05-26 213-681 0–9 XXXall 10 · 3 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LSAN DA 07 CA
2022-05-17 213-569 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2022-03-22 213-676 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2022-03-22 213-868 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H LSAN DA 01 CA
2022-03-22 213-886 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H LSAN DA 03 CA
2022-03-22 213-898 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H LSAN DA 05 CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.