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 619
PACIFIC BELL 190
NEW CINGULAR WIRELESS PCS, LLC 104
T-MOBILE USA, INC. 96
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 75
ONVOY, LLC - CA 49
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
2026-06-10 619-968 0–9 XXXall 10 · 2 holders which blocks → LEAP TELECOM, LLC 616J SNDG SNDG CA
2024-08-29 619-999 0–9 XXXall 10 · 6 holders which blocks → WIDE VOICE, LLC - CA 252F RNCHOSANFE CA
2024-03-26 619-986 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CHULAVISTA CA
2024-03-19 619-935 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNDG SNDG CA
2024-03-19 619-960 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CA 649C CHULAVISTA CA
2024-03-14 619-912 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C EL CAJON CA
2024-03-11 619-910 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C NATIONALCY CA
2024-02-29 619-903 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 EL CAJON CA
2024-01-24 619-604 0–9 XXXwhole prefix which blocks → ONVOY, LLC - CA 649C SNDG SNDG CA
2024-01-11 619-257 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CHULAVISTA CA
2023-05-17 619-619 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H RNCHOSANFE CA
2022-07-14 619-853 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CHULAVISTA CA
2022-07-06 619-815 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CA 649C CHULAVISTA CA
2022-05-26 619-803 0–9 XXXall 10 · 6 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNDG SNDG CA
2022-05-26 619-812 0–9 XXXall 10 · 3 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LA JOLLA CA
2022-01-24 619-848 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 DEL MAR CA
2022-01-19 619-984 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNDG SNDG CA
2022-01-14 619-983 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LA MESA CA
2021-12-10 619-974 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CHULAVISTA CA
2021-12-09 619-975 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 DULZURA CA
2021-10-29 619-943 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CHULAVISTA CA
2021-10-26 619-953 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LA JOLLA CA
2021-09-22 619-967 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 NATIONALCY CA
2021-09-17 619-963 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNDG SNDG CA
2021-09-13 619-951 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LA MESA CA
2021-08-23 619-949 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CHULAVISTA CA
2021-07-20 619-936 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CHULAVISTA CA
2021-06-04 619-945 0–9 XXXwhole prefix which blocks → COMCAST PHONE OF CALIFORNIA, LLC 394L LA MESA CA
2021-05-21 619-939 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CHULAVISTA CA
2021-03-25 619-714 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNDG SNDG CA
2021-03-17 619-907 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 SNDG SNDG CA
2021-03-04 619-918 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 NATIONALCY CA
2021-03-01 619-914 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E HARBSNALPN CA
2021-02-28 619-897 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CHULAVISTA CA
2021-02-25 619-657 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 LA MESA CA
2021-02-25 619-707 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 SNDG SNDG CA
2021-02-24 619-904 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CHULAVISTA CA
2021-01-27 619-626 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C EL CAJON CA
2021-01-22 619-927 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C CHULAVISTA CA
2021-01-08 619-902 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CHULAVISTA CA
2020-12-16 619-883 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CHULAVISTA CA
2020-12-16 619-891 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EL CAJON CA
2020-12-16 619-901 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EL CAJON CA
2020-12-14 619-859 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LA MESA CA
2020-12-09 619-769 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CHULAVISTA CA
2020-11-27 619-879 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CHULAVISTA CA
2020-11-25 619-837 0–9 XXXall 10 · 6 holders which blocks → IP HORIZON LLC 515J SNDG SNDG CA
2020-11-12 619-834 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EL CAJON CA
2020-11-12 619-875 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EL CAJON CA
2020-11-03 619-759 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CHULAVISTA 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.