NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

41 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

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
ONVOY, LLC - VA 10
BANDWIDTH.COM CLEC, LLC - VA 9
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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2016-03-02 571-552-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J DALE CITY VA
2016-02-22 571-778-3XXX 3000–3999Assigned ONVOY, LLC - VA 138E MANASSAS VA
2016-02-22 571-778-4XXX 4000–4999Assigned ONVOY, LLC - VA 138E MANASSAS VA
2016-02-22 571-933-4XXX 4000–4999Assigned ONVOY, LLC - VA 138E DULLESMTRO VA
2016-02-22 571-933-9XXX 9000–9999Assigned ONVOY, LLC - VA 138E DULLESMTRO VA
2016-02-22 571-934-1XXX 1000–1999Assigned ONVOY, LLC - VA 138E DULLES VA
2016-02-22 571-934-4XXX 4000–4999Assigned ONVOY, LLC - VA 138E DULLES VA
2016-02-17 571-992-0XXX 0000–0999Assigned ONVOY, LLC - VA 138E WSNGTNZN19 VA
2016-02-17 571-992-1XXX 1000–1999Assigned ONVOY, LLC - VA 138E WSNGTNZN19 VA
2016-02-16 571-343-2XXX 2000–2999Assigned ONVOY, LLC - VA 138E OCCOQUAN VA
2016-02-16 571-343-3XXX 3000–3999Assigned ONVOY, LLC - VA 138E OCCOQUAN VA
2016-02-12 571-639-3XXX 3000–3999Assigned ONVOY, LLC - VA 138E ARCOLA VA
2016-02-12 571-639-4XXX 4000–4999Assigned ONVOY, LLC - VA 138E ARCOLA VA
2016-02-11 571-800-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2016-02-09 571-459-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN19 VA
2016-02-09 571-552-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J DALE CITY VA
2016-02-09 571-719-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J MANASSAS VA
2016-02-08 571-444-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J WSNGTNZN08 VA
2016-02-04 571-365-3XXX 3000–3999Assigned ONVOY, LLC - VA 138E BRADDOCK VA
2016-02-04 571-365-7XXX 7000–7999Assigned ONVOY, LLC - VA 138E BRADDOCK VA
2016-01-26 571-778-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 MANASSAS VA
2016-01-13 571-373-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN19 VA
2016-01-13 571-373-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN19 VA
2016-01-13 571-373-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN19 VA
2016-01-13 571-778-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 MANASSAS VA
2016-01-13 571-778-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 MANASSAS VA
2016-01-13 571-778-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 MANASSAS VA
2016-01-12 571-775-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2016-01-12 571-775-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2016-01-06 571-474-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN19 VA
2016-01-06 571-474-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN19 VA
2016-01-06 571-474-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN19 VA
2016-01-06 571-552-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DALE CITY VA
2016-01-06 571-552-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DALE CITY VA
2016-01-06 571-552-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DALE CITY VA
2016-01-06 571-552-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DALE CITY VA
2016-01-06 571-585-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN19 VA
2015-12-31 571-322-8XXX 8000–8999Assigned ONVOY, LLC - VA 138E ENGLESIDE VA
2015-12-28 571-565-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN17 VA
2015-12-28 571-888-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DULLES VA
2015-12-21 571-510-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - VA 4644 LEESBURG VA
2015-12-18 571-719-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J MANASSAS VA
2015-12-18 571-800-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2015-12-17 571-444-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN08 VA
2015-12-11 571-635-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNGTNZN17 VA
2015-12-09 571-365-2XXX 2000–2999Assigned METROPCS, INC. 5562 BRADDOCK VA
2015-12-09 571-707-6XXX 6000–6999Assigned METROPCS, INC. 5562 LEESBURG VA
2015-12-04 571-342-4XXX 4000–4999Assigned ONVOY, LLC - VA 138E HERNDON VA
2015-12-04 571-342-5XXX 5000–5999Assigned ONVOY, LLC - VA 138E HERNDON VA
2015-12-04 571-342-6XXX 6000–6999Assigned ONVOY, LLC - VA 138E HERNDON VA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.