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 213
PACIFIC BELL 138
T-MOBILE USA, INC. 120
ONVOY, LLC - CA 65
NEW CINGULAR WIRELESS PCS, LLC 58
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 44
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
— 213-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 213-512 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H LSAN DA 07 CA
— 213-514 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 07 CA
— 213-515 0–9 XXXall 10 · 4 holders which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 06 CA
— 213-516 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LSAN DA 07 CA
— 213-517 not yet reported which blocks → 33 WIRELESS INC. 6967 LSAN DA 01 CA
— 213-519 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 LSAN DA 07 CA
— 213-520 not yet reported which blocks → PACIFIC BELL 9740 LSAN DA 14 CA
— 213-528 0–9 XXXall 10 · 4 holders which blocks → VOIP INNOVATIONS, LLC 597F LSAN DA 02 CA
— 213-529 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C LSAN DA 10 CA
— 213-532 4XXX8XXX which blocks → PACIFIC BELL 9740 LSAN DA 01 CA
— 213-533 0XXX2XXX6XXX9XXX · 2 holders which blocks → PACIFIC BELL 9740 LSAN DA 01 CA
— 213-534 6XXX7XXX8XXX which blocks → PAETEC ITEL, LLC 829J LSAN DA 01 CA
— 213-536 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 07 CA
— 213-537 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 01 CA
— 213-538 2XXX8XXX which blocks → PACIFIC BELL 9740 LSAN DA 01 CA
— 213-539 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 01 CA
— 213-542 0XXX which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LSAN DA 01 CA
— 213-545 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LSAN DA 07 CA
— 213-550 3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → IP HORIZON LLC 515J LSAN DA 01 CA
— 213-553 not yet reported which blocks → PACIFIC BELL 9740 LSAN DA 01 CA
— 213-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST CA
— 213-559 1XXX3XXX4XXX5XXX6XXX · 4 holders which blocks → ONVOY, LLC - CA 649C LSAN DA 01 CA
— 213-570 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 10 CA
— 213-572 6XXX7XXX8XXX9XXX · 2 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LSAN DA 01 CA
— 213-576 0XXX9XXX · 2 holders which blocks → PACIFIC BELL 9740 LSAN DA 01 CA
— 213-580 not yet reported which blocks → PACIFIC BELL 9740 LSAN DA 01 CA
— 213-587 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CA 649C LSAN DA 01 CA
— 213-590 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LSAN DA 01 CA
— 213-591 none assigned yet which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CMTN GRDN CA
— 213-593 not yet reported which blocks → PACIFIC BELL 9740 LSAN DA 01 CA
— 213-595 7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LSAN DA 01 CA
— 213-596 not yet reported which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 01 CA
— 213-598 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 01 CA
— 213-599 2XXX3XXX6XXX7XXX8XXX · 2 holders which blocks → PACIFIC BELL 9740 LSAN DA 01 CA
— 213-600 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CA 649C LSAN DA 10 CA
— 213-602 0–9 XXXall 10 · 5 holders which blocks → LEAP TELECOM, LLC 616J LSAN DA 01 CA
— 213-604 8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 01 CA
— 213-605 3XXX4XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 01 CA
— 213-607 not yet reported which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LSAN DA 01 CA
— 213-608 2XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LSAN DA 07 CA
— 213-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 213-612 not yet reported which blocks → PACIFIC BELL 9740 LSAN DA 01 CA
— 213-613 5XXX8XXX · 2 holders which blocks → PACIFIC BELL 9740 LSAN DA 01 CA
— 213-614 not yet reported which blocks → PACIFIC BELL 9740 LSAN DA 01 CA
— 213-615 9XXX which blocks → PACIFIC BELL 9740 LSAN DA 01 CA
— 213-616 3XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LSAN DA 10 CA
— 213-617 not yet reported which blocks → PACIFIC BELL 9740 LSAN DA 01 CA
— 213-618 3XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LSAN DA 01 CA
— 213-620 not yet reported which blocks → PACIFIC BELL 9740 LSAN DA 01 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.