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
— 650-801 2XXX8XXX9XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNCRL-BLMT CA
— 650-802 not yet reported which blocks → PACIFIC BELL 9740 SNCRL-BLMT CA
— 650-808 0XXX5XXX7XXX9XXX · 3 holders which blocks → PACIFIC BELL 9740 SSNFRNCSCO CA
— 650-810 3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MT VIEW CA
— 650-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 650-812 9XXX which blocks → PACIFIC BELL 9740 PALO ALTO CA
— 650-813 2XXX3XXX · 2 holders which blocks → PACIFIC BELL 9740 PALO ALTO CA
— 650-814 none assigned yet which blocks → METROPCS, INC. 5562 PALO ALTO CA
— 650-815 1XXX5XXX6XXX8XXX9XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PALO ALTO CA
— 650-817 5XXX7XXX8XXX · 3 holders which blocks → PACIFIC BELL 9740 REDWOOD CY CA
— 650-821 not yet reported which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SSNFRNCSCO CA
— 650-823 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LOS ALTOS CA
— 650-825 0XXX1XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SSNFRNCSCO CA
— 650-826 2XXX3XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 SSNFRNCSCO CA
— 650-827 5XXX which blocks → PACIFIC BELL 9740 SSNFRNCSCO CA
— 650-829 not yet reported which blocks → PACIFIC BELL 9740 SSNFRNCSCO CA
— 650-832 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNCRL-BLMT CA
— 650-833 8XXX9XXX which blocks → PACIFIC BELL 9740 PALO ALTO CA
— 650-835 3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → IP HORIZON LLC 515J SSNFRNCSCO CA
— 650-837 0XXX1XXX3XXX6XXX · 3 holders which blocks → PACIFIC BELL 9740 SSNFRNCSCO CA
— 650-838 not yet reported which blocks → PACIFIC BELL 9740 PALO ALTO CA
— 650-839 2XXX3XXX4XXX6XXX7XXX9XXX · 4 holders which blocks → PACIFIC BELL 9740 REDWOOD CY CA
— 650-842 0XXX which blocks → PACIFIC BELL 9740 PALO ALTO CA
— 650-843 9XXX which blocks → PACIFIC BELL 9740 PALO ALTO CA
— 650-845 2XXX7XXX9XXX · 3 holders which blocks → PACIFIC BELL 9740 PALO ALTO CA
— 650-846 not yet reported which blocks → PACIFIC BELL 9740 PALO ALTO CA
— 650-847 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PALO ALTO CA
— 650-849 8XXX which blocks → PACIFIC BELL 9740 PALO ALTO CA
— 650-850 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 WOODSIDE CA
— 650-851 not yet reported which blocks → PACIFIC BELL 9740 WOODSIDE CA
— 650-852 1XXX8XXX · 2 holders which blocks → PACIFIC BELL 9740 PALO ALTO CA
— 650-853 9XXX which blocks → PACIFIC BELL 9740 PALO ALTO CA
— 650-854 not yet reported which blocks → PACIFIC BELL 9740 PALO ALTO CA
— 650-855 4XXX which blocks → PACIFIC BELL 9740 PALO ALTO CA
— 650-856 not yet reported which blocks → PACIFIC BELL 9740 PALO ALTO CA
— 650-857 not yet reported which blocks → PACIFIC BELL 9740 PALO ALTO CA
— 650-858 not yet reported which blocks → PACIFIC BELL 9740 PALO ALTO CA
— 650-859 not yet reported which blocks → PACIFIC BELL 9740 PALO ALTO CA
— 650-860 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PESCADERO CA
— 650-862 2XXX4XXX5XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PALO ALTO CA
— 650-863 2XXX3XXX4XXX5XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SAN MATEO CA
— 650-864 0XXX2XXX3XXX4XXX6XXX8XXX · 4 holders which blocks → PACIFIC BELL 9740 MT VIEW CA
— 650-866 0XXX1XXX5XXX8XXX9XXX · 5 holders which blocks → PACIFIC BELL 9740 SSNFRNCSCO CA
— 650-867 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SAN MATEO CA
— 650-868 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 REDWOOD CY CA
— 650-869 9XXX which blocks → PACIFIC BELL 9740 SSNFRNCSCO CA
— 650-870 5XXX7XXX8XXX9XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SSNFRNCSCO CA
— 650-871 not yet reported which blocks → PACIFIC BELL 9740 SSNFRNCSCO CA
— 650-872 9XXX which blocks → PACIFIC BELL 9740 SSNFRNCSCO CA
— 650-873 not yet reported which blocks → PACIFIC BELL 9740 SSNFRNCSCO 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.