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 562
FRONTIER CALIFORNIA INC. 158
T-MOBILE USA, INC. 99
NEW CINGULAR WIRELESS PCS, LLC 78
ONVOY, LLC - CA 45
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 45
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
2023-08-03 562-482 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LONG BEACH CA
2023-06-26 562-312 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C ALAMITOS CA
2023-06-26 562-687 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C WHITTIER CA
2023-06-26 562-703 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CA 649C PICORIVERA CA
2023-05-03 562-675 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LONG BEACH CA
2023-05-03 562-681 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LONG BEACH CA
2023-04-12 562-672 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H LA HABRA CA
2023-04-07 562-647 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CA 649C NORWALK CA
2023-04-07 562-670 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C WHITTIER CA
2023-03-10 562-642 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LONG BEACH CA
2023-01-30 562-636 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 DOWNEY CA
2022-12-08 562-614 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E ALAMITOS CA
2022-11-03 562-603 0–9 XXXall 10 · 5 holders which blocks → METROPCS NETWORKS, LLC 899D NORWALK CA
2022-10-28 562-586 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E PICORIVERA CA
2022-10-24 562-605 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LONG BEACH CA
2022-10-21 562-617 0–9 XXXall 10 · 2 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LONG BEACH CA
2022-10-20 562-442 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C WHITTIER CA
2022-10-17 562-635 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E DOWNEY CA
2022-10-10 562-574 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E NORWALK CA
2022-10-04 562-581 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LAKEWOOD CA
2022-09-27 562-562 0–9 XXXwhole prefix which blocks → ONVOY, LLC - CA 649C NORWALK CA
2022-08-25 562-610 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H LONG BEACH CA
2022-08-25 562-710 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H NORWALK CA
2022-07-22 562-564 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E NORWALK CA
2022-07-22 562-573 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LONG BEACH CA
2022-03-10 562-848 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LA HABRA CA
2022-02-28 562-613 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 NORWALK CA
2022-01-10 562-784 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ALAMITOS CA
2022-01-10 562-837 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J DOWNEY CA
2022-01-07 562-783 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WHITTIER CA
2021-12-14 562-580 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 LONG BEACH CA
2021-11-15 562-609 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ALAMITOS CA
2021-11-03 562-620 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H LONG BEACH CA
2021-10-26 562-579 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E DOWNEY CA
2021-10-25 562-669 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H NORWALK CA
2021-10-13 562-578 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 ALAMITOS CA
2021-09-24 562-575 0–9 XXXall 10 · 2 holders which blocks → COMMIO, LLC 939H ALAMITOS CA
2021-09-17 562-571 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 DOWNEY CA
2021-07-29 562-540 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LONG BEACH CA
2021-07-16 562-538 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ALAMITOS CA
2021-07-01 562-532 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LONG BEACH CA
2021-06-17 562-516 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 DOWNEY CA
2021-03-31 562-939 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ALAMITOS CA
2021-03-03 562-550 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 WHITTIER CA
2021-02-24 562-542 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LONG BEACH CA
2021-02-19 562-549 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LONG BEACH CA
2021-02-16 562-539 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F NORWALK CA
2021-02-03 562-563 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H LONG BEACH CA
2020-12-16 562-535 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LONG BEACH CA
2020-12-15 562-534 0–9 XXXwhole prefix which blocks → ONVOY, LLC - CA 649C LONG BEACH 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.