NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

2 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, last 30 days — NPA 619
NEW CINGULAR WIRELESS PCS, LLC 1
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 1
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 thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2003-10-20 619-387-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 EL CAJON CA
2003-10-20 619-664-5XXX 5000–5999Assigned METROPCS, INC. 5562 SNDG SNDG CA
2003-10-20 619-664-6XXX 6000–6999Assigned METROPCS, INC. 5562 SNDG SNDG CA
2003-10-20 619-664-7XXX 7000–7999Assigned METROPCS, INC. 5562 SNDG SNDG CA
2003-10-20 619-664-8XXX 8000–8999Assigned METROPCS, INC. 5562 SNDG SNDG CA
2003-10-20 619-664-9XXX 9000–9999Assigned METROPCS, INC. 5562 SNDG SNDG CA
2003-10-09 619-546-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNDG SNDG CA
2003-10-06 619-741-9XXX 9000–9999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L LA MESA CA
2003-09-25 619-307-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG SNDG CA
2003-09-25 619-309-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG SNDG CA
2003-09-25 619-309-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG SNDG CA
2003-09-25 619-325-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG SNDG CA
2003-09-25 619-328-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EL CAJON CA
2003-09-25 619-328-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EL CAJON CA
2003-09-25 619-341-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG SNDG CA
2003-09-25 619-358-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG SNDG CA
2003-09-25 619-400-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG SNDG CA
2003-09-25 619-400-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG SNDG CA
2003-09-25 619-446-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG SNDG CA
2003-09-25 619-446-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG SNDG CA
2003-09-25 619-578-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG SNDG CA
2003-09-25 619-578-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG SNDG CA
2003-09-25 619-578-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG SNDG CA
2003-09-25 619-578-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG SNDG CA
2003-09-25 619-578-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG SNDG CA
2003-09-25 619-608-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SNDG SNDG CA
2003-09-25 619-608-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SNDG SNDG CA
2003-09-25 619-608-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SNDG SNDG CA
2003-09-25 619-608-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SNDG SNDG CA
2003-09-25 619-608-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SNDG SNDG CA
2003-09-25 619-608-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SNDG SNDG CA
2003-09-25 619-649-1XXX 1000–1999Assigned METROPCS, INC. 5562 NATIONALCY CA
2003-09-25 619-649-3XXX 3000–3999Assigned METROPCS, INC. 5562 NATIONALCY CA
2003-09-25 619-649-5XXX 5000–5999Assigned METROPCS, INC. 5562 NATIONALCY CA
2003-09-25 619-758-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG SNDG CA
2003-09-24 619-760-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 EL CAJON CA
2003-09-22 619-403-4XXX 4000–4999Assigned METROPCS, INC. 5562 LA MESA CA
2003-09-18 619-367-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J PINEVALLEY CA
2003-09-17 619-320-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J HARBSNALPN CA
2003-09-15 619-328-1XXX 1000–1999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L EL CAJON CA
2003-09-11 619-245-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 NATIONALCY CA
2003-09-09 619-827-2XXX 2000–2999Assigned METROPCS, INC. 5562 CHULAVISTA CA
2003-09-09 619-827-3XXX 3000–3999Assigned METROPCS, INC. 5562 CHULAVISTA CA
2003-09-09 619-827-4XXX 4000–4999Assigned METROPCS, INC. 5562 CHULAVISTA CA
2003-09-05 619-863-6XXX 6000–6999Assigned METROPCS, INC. 5562 CHULAVISTA CA
2003-09-05 619-863-7XXX 7000–7999Assigned METROPCS, INC. 5562 CHULAVISTA CA
2003-09-05 619-863-9XXX 9000–9999Assigned METROPCS, INC. 5562 CHULAVISTA CA
2003-09-02 619-245-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 NATIONALCY CA
2003-09-02 619-737-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CHULAVISTA CA
2003-08-22 619-722-1XXX 1000–1999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L HARBSNALPN CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.