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 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
2020-10-22 619-845 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CHULAVISTA CA
2020-10-15 619-716 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 EL CAJON CA
2020-09-08 619-418 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CHULAVISTA CA
2020-08-18 619-712 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CHULAVISTA CA
2020-08-13 619-706 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CHULAVISTA CA
2020-07-28 619-689 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EL CAJON CA
2020-07-06 619-776 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LA MESA CA
2020-04-07 619-854 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNDG SNDG CA
2020-03-26 619-679 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CHULAVISTA CA
2020-03-20 619-650 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 CHULAVISTA CA
2020-03-05 619-705 0–9 XXXall 10 · 4 holders which blocks → CSC WIRELESS, LLC 425J SNDG SNDG CA
2020-02-10 619-509 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EL CAJON CA
2020-01-29 619-617 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 CHULAVISTA CA
2019-12-17 619-614 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E CHULAVISTA CA
2019-09-13 619-613 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LA MESA CA
2019-08-13 619-703 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CHULAVISTA CA
2019-06-24 619-603 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 NATIONALCY CA
2019-05-20 619-860 0–9 XXXall 10 · 6 holders which blocks → ONVOY SPECTRUM, LLC 624H SNDG SNDG CA
2019-03-19 619-877 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H SNDG MRMS CA
2019-03-19 619-932 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H CHULAVISTA CA
2018-05-08 619-310 0–9 XXXall 10 · 5 holders which blocks → AIRESPRING, INC. 996H SNDG SNDG CA
2017-10-09 619-439 0–9 XXXall 10 · 4 holders which blocks → COMCAST PHONE OF CALIFORNIA, LLC 394L LA MESA CA
2017-10-03 619-612 0–9 XXXall 10 · 5 holders which blocks → COMCAST PHONE OF CALIFORNIA, LLC 394L HARBSNALPN CA
2017-09-18 619-349 0–9 XXXall 10 · 4 holders which blocks → COMCAST PHONE OF CALIFORNIA, LLC 394L CHULAVISTA CA
2017-03-29 619-909 0–9 XXXall 10 · 3 holders which blocks → COMMIO, LLC 939H SNDG SNDG CA
2017-03-23 619-530 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 SNDG SNDG CA
2016-12-21 619-745 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 CHULAVISTA CA
2016-12-01 619-830 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CHULAVISTA CA
2016-11-29 619-514 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 SNDG SNDG CA
2016-10-27 619-695 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C SNDG SNDG CA
2016-10-24 619-558 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 EL CAJON CA
2016-10-18 619-622 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CHULAVISTA CA
2016-10-10 619-775 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - CA 649C CORONADO CA
2016-09-21 619-833 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CA 649C JACUMBA CA
2016-09-19 619-389 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 SNDG SNDG CA
2016-09-16 619-340 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LA MESA CA
2016-09-07 619-771 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C LA MESA CA
2016-08-26 619-480 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 NATIONALCY CA
2016-08-12 619-404 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 EL CAJON CA
2016-08-09 619-629 0–9 XXXall 10 · 2 holders which blocks → VONAGE AMERICA LLC 197D SNDG SNDG CA
2016-06-29 619-513 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CHULAVISTA CA
2016-06-24 619-601 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E CHULAVISTA CA
2016-05-11 619-369 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CA 649C HARBSNALPN CA
2016-04-15 619-329 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7147 SNDG SNDG CA
2016-04-15 619-343 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 SNDG SNDG CA
2016-03-16 619-314 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNDG SNDG CA
2016-02-03 619-782 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - CA 649C SNDG SNDG CA
2016-02-01 619-323 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNDG SNDG CA
2016-01-29 619-505 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C NATIONALCY CA
2016-01-28 619-305 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C CHULAVISTA 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.