NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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, last 30 days
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 21
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
— 650-724 not yet reported which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PALO ALTO CA
— 650-725 not yet reported which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PALO ALTO CA
— 650-726 not yet reported which blocks → PACIFIC BELL 9740 HALFMOONBY CA
— 650-728 4XXX6XXX · 2 holders which blocks → PACIFIC BELL 9740 MOSS BEACH CA
— 650-729 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 HALFMOONBY CA
— 650-730 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNCRL-BLMT CA
— 650-731 0XXX1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 5 holders which blocks → ASTOUND BROADBAND, LLC - CA 485E SNFC JUNPR CA
— 650-732 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MILLBRAE CA
— 650-733 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 PACIFICA CA
— 650-735 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 PACIFICA CA
— 650-736 not yet reported which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PALO ALTO CA
— 650-737 2XXX4XXX · 2 holders which blocks → PACIFIC BELL 9740 SSNFRNCSCO CA
— 650-738 not yet reported which blocks → PACIFIC BELL 9740 PACIFICA CA
— 650-739 2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → PACIFIC BELL 9740 PALO ALTO CA
— 650-740 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SAN MATEO CA
— 650-741 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PACIFIC BELL 9740 SSNFRNCSCO CA
— 650-742 not yet reported which blocks → PACIFIC BELL 9740 SSNFRNCSCO CA
— 650-743 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 REDWOOD CY CA
— 650-745 5XXX6XXX which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SSNFRNCSCO CA
— 650-746 3XXX4XXX5XXX8XXX9XXX · 2 holders which blocks → PACIFIC BELL 9740 SNFC JUNPR CA
— 650-747 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → PACIFIC BELL 9740 LA HONDA CA
— 650-748 1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 LA HONDA CA
— 650-749 1XXX3XXX6XXX7XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LA HONDA CA
— 650-752 1XXX4XXX6XXX8XXX9XXX · 4 holders which blocks → PACIFIC BELL 9740 PALO ALTO CA
— 650-754 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → PACIFIC BELL 9740 SSNFRNCSCO CA
— 650-755 not yet reported which blocks → PACIFIC BELL 9740 SNFC JUNPR CA
— 650-756 not yet reported which blocks → PACIFIC BELL 9740 SNFC JUNPR CA
— 650-757 not yet reported which blocks → PACIFIC BELL 9740 SNFC JUNPR CA
— 650-758 0XXX7XXX8XXX9XXX · 4 holders which blocks → PACIFIC BELL 9740 SNFC JUNPR CA
— 650-759 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN MATEO CA
— 650-761 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 2 holders which blocks → PACIFIC BELL 9740 SNFC JUNPR CA
— 650-762 4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → PACIFIC BELL 9740 SAN MATEO CA
— 650-763 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SSNFRNCSCO CA
— 650-766 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SAN MATEO CA
— 650-769 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SNCRL-BLMT CA
— 650-776 0XXX which blocks → METROPCS, INC. 5562 PALO ALTO CA
— 650-777 1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → PACIFIC BELL 9740 MILLBRAE CA
— 650-779 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 REDWOOD CY CA
— 650-780 3XXX6XXX which blocks → PACIFIC BELL 9740 REDWOOD CY CA
— 650-781 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SAN MATEO CA
— 650-784 0XXX2XXX4XXX7XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 SSNFRNCSCO CA
— 650-786 not yet reported which blocks → PACIFIC BELL 9740 REDWOOD CY CA
— 650-787 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SAN MATEO CA
— 650-793 7XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MT VIEW CA
— 650-794 not yet reported which blocks → PACIFIC BELL 9740 SSNFRNCSCO CA
— 650-795 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LA HONDA CA
— 650-796 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PALO ALTO CA
— 650-798 4XXX7XXX9XXX which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 PALO ALTO CA
— 650-799 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PALO ALTO CA
— 650-800 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C PALO ALTO CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.