NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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 209
PACIFIC BELL 181
NEW CINGULAR WIRELESS PCS, LLC 128
ONVOY, LLC - CA 76
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 71
T-MOBILE USA, INC. 69
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
2025-01-28 209-397 0–9 XXXall 10 · 2 holders which blocks → TWILIO INTERNATIONAL, INC. 506J MANTECA CA
2024-11-25 209-335 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ANGELSCAMP CA
2023-10-16 209-709 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C STOCKTON CA
2023-10-04 209-654 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CA 649C TRACY CA
2023-07-18 209-517 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 JAMESTOWN CA
2023-06-27 209-515 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - CA 649C SUTTER CRK CA
2023-06-22 209-393 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CA 649C SNRA JUNO CA
2022-09-28 209-209 0–9 XXXwhole prefix which blocks → ONVOY, LLC - CA 649C MODESTO CA
2022-09-28 209-991 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LIVINGSTON CA
2022-09-28 209-994 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 RIPON CA
2022-09-09 209-972 0–9 XXXall 10 · 4 holders which blocks → HD CARRIER LLC 321J MANTECA CA
2022-08-09 209-997 0XXX7XXX9XXX · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J FARMINGTON CA
2022-07-11 209-970 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H PLYMOUTH CA
2022-07-11 209-971 0–9 XXXall 10 · 4 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MODESTO CA
2022-06-08 209-960 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 TURLOCK CA
2022-05-09 209-935 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CA 649C DOS PALOS CA
2022-05-09 209-936 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 STOCKTON CA
2022-04-11 209-904 0–9 XXXall 10 · 7 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J LODI CA
2022-04-11 209-906 0–9 XXXall 10 · 6 holders which blocks → UTILITY TELECOM GROUP, LLC - CA 9262 MERCED CA
2022-03-10 209-767 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ATWATER CA
2022-03-10 209-776 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 JACKSON CA
2022-02-10 209-919 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 OAKDALE CA
2022-02-10 209-963 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SNRA JUNO CA
2022-01-12 209-876 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MODESTO CA
2022-01-12 209-961 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J MODESTO CA
2021-12-08 209-864 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ATWATER CA
2021-12-08 209-901 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C STOCKTON CA
2021-11-09 209-865 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E GALT CA
2021-11-09 209-925 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C SNRA MAIN CA
2021-10-08 209-880 0–9 XXXall 10 · 6 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J MANTECA CA
2021-08-09 209-998 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H MANTECA CA
2021-07-20 209-930 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PLANADA CA
2021-07-16 209-849 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 MODESTO CA
2021-07-16 209-875 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 MERCED CA
2021-06-30 209-871 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 STOCKTON CA
2021-06-23 209-884 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MANTECA CA
2021-06-23 209-913 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TURLOCK CA
2021-05-10 209-934 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MERCED CA
2021-04-27 209-801 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H JAMESTOWN CA
2021-03-25 209-891 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ATWATER CA
2021-03-18 209-889 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 STOCKTON CA
2021-03-11 209-921 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H STOCKTON CA
2021-03-10 209-706 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LINDEN CA
2021-03-02 209-866 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H ANGELSCAMP CA
2021-02-17 209-512 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F YOSEMITE CA
2021-02-09 209-657 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 RIVERBANK CA
2021-02-02 209-860 0–9 XXXall 10 · 5 holders which blocks → UTILITY TELECOM GROUP, LLC - CA 9262 MODESTO CA
2020-12-07 209-816 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CA 649C LODI CA
2020-12-01 209-807 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ANGELSCAMP CA
2020-11-30 209-798 0–9 XXXall 10 · 6 holders which blocks → IP HORIZON LLC 515J STOCKTON CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.