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
— 619-824 2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J CAMPO CA
— 619-825 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → COMCAST PHONE OF CALIFORNIA, LLC 394L LA MESA CA
— 619-827 0–9 XXXall 10 · 3 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CHULAVISTA CA
— 619-828 3XXX5XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 LA MESA CA
— 619-829 none assigned yet which blocks → METROPCS, INC. 5562 NATIONALCY CA
— 619-835 not yet reported which blocks → NORTH COUNTY COMMUNICATION CORPORATION - CA 7894 SNDG SNDG CA
— 619-838 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNDG SNDG CA
— 619-839 9XXX which blocks → ONVOY, LLC - CA 649C SNDG SNDG CA
— 619-840 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNDG SNDG CA
— 619-841 0–9 XXXall 10 · 5 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CORONADO CA
— 619-842 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C PINEVALLEY CA
— 619-843 none assigned yet which blocks → METROPCS, INC. 5562 SNDG SNDG CA
— 619-844 0–9 XXXall 10 · 4 holders which blocks → COMCAST PHONE OF CALIFORNIA, LLC 394L SNDG SNDG CA
— 619-846 none assigned yet which blocks → METROPCS, INC. 5562 SNDG SNDG CA
— 619-847 none assigned yet which blocks → METROPCS, INC. 5562 SNDG SNDG CA
— 619-849 0XXX9XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7147 SNDG SNDG CA
— 619-850 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG SNDG CA
— 619-851 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNDG SNDG CA
— 619-852 0XXX7XXX · 2 holders which blocks → METROPCS, INC. 5562 CHULAVISTA CA
— 619-856 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 NATIONALCY CA
— 619-857 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNDG SNDG CA
— 619-858 not yet reported which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 SNDG SNDG CA
— 619-861 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG SNDG CA
— 619-863 0XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → IP HORIZON LLC 515J CHULAVISTA CA
— 619-864 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → METROPCS, INC. 5562 CHULAVISTA CA
— 619-865 none assigned yet which blocks → T-MOBILE USA, INC. 6529 CORONADO CA
— 619-866 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNDG SNDG CA
— 619-867 0XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 LA MESA CA
— 619-868 not yet reported which blocks → NORTH COUNTY COMMUNICATION CORPORATION - CA 7894 CAMPO CA
— 619-871 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNDG SNDG CA
— 619-872 1XXX3XXX5XXX8XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 CHULAVISTA CA
— 619-873 4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J EL CAJON CA
— 619-878 0XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 CORONADO CA
— 619-880 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SNDG SNDG CA
— 619-881 7XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 SNDG SNDG CA
— 619-884 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNDG SNDG CA
— 619-886 0XXX which blocks → METROPCS, INC. 5562 SNDG SNDG CA
— 619-889 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNDG SNDG CA
— 619-890 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNDG SNDG CA
— 619-893 not yet reported which blocks → SPOK, INC. 6630 SNDG SNDG CA
— 619-896 not yet reported which blocks → SPOK, INC. 6630 SNDG SNDG CA
— 619-898 not yet reported which blocks → SPOK, INC. 6630 SNDG SNDG CA
— 619-899 not yet reported which blocks → SPOK, INC. 6630 SNDG SNDG CA
— 619-900 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E NATIONALCY CA
— 619-906 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PACIFIC BELL 9740 SNDG SNDG CA
— 619-908 0XXX1XXX2XXX9XXX · 3 holders which blocks → PACIFIC BELL 9740 SNDG SNDG CA
— 619-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 619-915 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNDG SNDG CA
— 619-916 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 LA MESA CA
— 619-917 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG SNDG 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.