NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

41 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2019-02-11 571-390-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F NOKESVILLE VA
2019-02-11 571-390-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F NOKESVILLE VA
2019-02-11 571-412-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F OCCOQUAN VA
2019-02-11 571-412-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F OCCOQUAN VA
2019-02-11 571-412-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F OCCOQUAN VA
2019-02-11 571-412-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F OCCOQUAN VA
2019-02-11 571-412-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F OCCOQUAN VA
2019-01-28 571-669-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN19 VA
2019-01-24 571-347-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 VA
2019-01-24 571-619-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 MANASSAS VA
2019-01-24 571-619-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 MANASSAS VA
2019-01-11 571-401-0XXX 0000–0999Assigned TELNYX LLC 073H HERNDON VA
2019-01-08 571-397-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN08 VA
2019-01-04 571-370-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ARCOLA VA
2019-01-03 571-407-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN19 VA
2019-01-03 571-595-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN19 VA
2018-12-26 571-407-3XXX 3000–3999Assigned TELNYX LLC 073H WSNGTNZN19 VA
2018-12-21 571-300-3XXX 3000–3999Assigned METROPCS, INC. 5562 DALE CITY VA
2018-12-21 571-412-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 OCCOQUAN VA
2018-12-20 571-394-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 TRIANGLE VA
2018-12-20 571-397-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 VA
2018-12-20 571-619-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 MANASSAS VA
2018-12-19 571-397-0XXX 0000–0999Assigned TELNYX LLC 073H WSNGTNZN08 VA
2018-12-17 571-407-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN19 VA
2018-12-17 571-407-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN19 VA
2018-12-11 571-407-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN19 VA
2018-12-11 571-407-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN19 VA
2018-12-07 571-634-1XXX 1000–1999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2018-12-03 571-370-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F ARCOLA VA
2018-11-28 571-368-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DALE CITY VA
2018-11-28 571-669-0XXX 0000–0999Assigned VONAGE AMERICA LLC 197D WSNGTNZN19 VA
2018-11-28 571-669-1XXX 1000–1999Assigned VONAGE AMERICA LLC 197D WSNGTNZN19 VA
2018-11-28 571-669-2XXX 2000–2999Assigned VONAGE AMERICA LLC 197D WSNGTNZN19 VA
2018-11-26 571-396-3XXX 3000–3999Assigned VONAGE AMERICA LLC 197D WSNGTNZN19 VA
2018-11-26 571-396-4XXX 4000–4999Assigned VONAGE AMERICA LLC 197D WSNGTNZN19 VA
2018-11-26 571-396-5XXX 5000–5999Assigned VONAGE AMERICA LLC 197D WSNGTNZN19 VA
2018-11-26 571-396-6XXX 6000–6999Assigned VONAGE AMERICA LLC 197D WSNGTNZN19 VA
2018-11-26 571-396-7XXX 7000–7999Assigned VONAGE AMERICA LLC 197D WSNGTNZN19 VA
2018-11-26 571-396-8XXX 8000–8999Assigned VONAGE AMERICA LLC 197D WSNGTNZN19 VA
2018-11-26 571-396-9XXX 9000–9999Assigned VONAGE AMERICA LLC 197D WSNGTNZN19 VA
2018-11-26 571-412-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 OCCOQUAN VA
2018-11-20 571-619-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 MANASSAS VA
2018-11-19 571-401-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HERNDON VA
2018-11-19 571-401-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HERNDON VA
2018-11-19 571-401-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HERNDON VA
2018-11-19 571-401-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HERNDON VA
2018-11-19 571-401-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HERNDON VA
2018-11-15 571-396-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN19 VA
2018-11-15 571-396-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN19 VA
2018-11-14 571-685-4XXX 4000–4999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G HERNDON VA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.