NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

43 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 571
BANDWIDTH.COM CLEC, LLC - VA 11
ONVOY, LLC - VA 10
OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 7
NEW CINGULAR WIRELESS PCS, LLC - DC 6
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6
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
2007-10-09 571-490-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN19 VA
2007-10-09 571-490-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN19 VA
2007-10-05 571-209-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LEESBURG VA
2007-10-05 571-257-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2007-10-04 571-296-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2007-10-04 571-296-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2007-10-04 571-296-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2007-10-04 571-296-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2007-10-02 571-291-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J LEESBURG VA
2007-09-26 571-257-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN08 VA
2007-09-21 571-257-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2007-09-21 571-257-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2007-09-21 571-257-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2007-09-21 571-285-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J DALE CITY VA
2007-09-21 571-285-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J DALE CITY VA
2007-09-21 571-285-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J DALE CITY VA
2007-09-21 571-297-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN17 VA
2007-09-17 571-257-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN08 VA
2007-09-17 571-297-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN17 VA
2007-09-10 571-313-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HERNDON VA
2007-09-10 571-484-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HERNDON VA
2007-09-08 571-313-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J HERNDON VA
2007-09-08 571-313-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J HERNDON VA
2007-09-08 571-490-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN19 VA
2007-09-06 571-257-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN08 VA
2007-09-06 571-271-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 LEESBURG VA
2007-09-06 571-766-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN17 VA
2007-08-30 571-297-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN17 VA
2007-08-29 571-297-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN17 VA
2007-08-29 571-297-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN17 VA
2007-08-14 571-490-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN19 VA
2007-08-14 571-490-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN19 VA
2007-08-14 571-730-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2007-08-14 571-830-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2007-08-14 571-830-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2007-08-13 571-297-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN17 VA
2007-08-13 571-297-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN17 VA
2007-08-08 571-748-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN19 VA
2007-08-08 571-748-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN19 VA
2007-08-08 571-926-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 HERNDON VA
2007-08-08 571-926-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 HERNDON VA
2007-08-08 571-926-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 HERNDON VA
2007-08-03 571-312-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2007-08-03 571-312-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2007-08-03 571-312-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2007-08-01 571-839-0XXX 0000–0999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2007-08-01 571-839-1XXX 1000–1999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2007-08-01 571-839-2XXX 2000–2999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2007-08-01 571-839-3XXX 3000–3999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2007-08-01 571-839-4XXX 4000–4999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA

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.