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
2022-03-22 213-997 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H LSAN DA 09 CA
2022-03-22 213-998 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H LSAN DA 07 CA
2022-03-10 213-757 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 LSAN DA 01 CA
2022-03-07 213-672 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 06 CA
2022-03-04 213-671 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 MONTEBELLO CA
2022-03-02 213-654 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MONTEBELLO CA
2022-03-02 213-727 0–9 XXXall 10 · 7 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LSAN DA 08 CA
2022-02-28 213-653 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 10 CA
2022-02-23 213-726 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LSAN DA 13 CA
2022-02-22 213-650 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 09 CA
2022-02-21 213-832 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LSAN DA 12 CA
2022-02-18 213-836 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LSAN DA 02 CA
2022-01-27 213-643 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 04 CA
2022-01-26 213-647 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 03 CA
2022-01-24 213-651 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 01 CA
2022-01-07 213-649 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 11 CA
2022-01-07 213-837 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LSAN DA 09 CA
2021-12-02 213-646 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2021-11-18 213-645 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 10 CA
2021-11-17 213-778 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H LSAN DA 01 CA
2021-11-15 213-642 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2021-11-15 213-648 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2021-11-10 213-601 0–9 XXXwhole prefix which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2021-11-10 213-641 0–9 XXXall 10 · 2 holders which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 13 CA
2021-11-03 213-586 0–9 XXXwhole prefix which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 02 CA
2021-11-03 213-594 0–9 XXXall 10 · 3 holders which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 06 CA
2021-11-03 213-638 0–9 XXXwhole prefix which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 10 CA
2021-10-28 213-492 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2021-10-28 213-574 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 07 CA
2021-10-26 213-592 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 03 CA
2021-10-11 213-575 0–9 XXXall 10 · 3 holders which blocks → VONAGE AMERICA LLC 197D LSAN DA 05 CA
2021-09-27 213-584 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 04 CA
2021-09-13 213-597 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 13 CA
2021-09-07 213-581 0–9 XXXall 10 · 2 holders which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 02 CA
2021-09-07 213-582 0–9 XXXall 10 · 3 holders which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 10 CA
2021-09-07 213-589 0–9 XXXall 10 · 4 holders which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2021-09-07 213-779 0–9 XXXall 10 · 4 holders which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 06 CA
2021-08-31 213-871 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 11 CA
2021-08-23 213-585 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2021-08-05 213-668 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H LSAN DA 05 CA
2021-08-05 213-669 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H LSAN DA 01 CA
2021-08-05 213-889 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H LSAN DA 09 CA
2021-07-29 213-565 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MONTEBELLO CA
2021-07-29 213-578 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MONTEBELLO CA
2021-07-16 213-564 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2021-07-07 213-562 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 LSAN DA 04 CA
2021-07-01 213-502 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MONTEBELLO CA
2021-06-25 213-561 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 07 CA
2021-06-25 213-563 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 01 CA
2021-06-11 213-558 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 12 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.