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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2020-05-12 571-415-9XXX 9000–9999Assigned VONAGE AMERICA LLC 197D HAYMARKET VA
2020-05-12 571-520-1XXX 1000–1999Assigned ONVOY, LLC - VA 138E HERNDON VA
2020-05-12 571-520-2XXX 2000–2999Assigned ONVOY, LLC - VA 138E HERNDON VA
2020-05-12 571-520-3XXX 3000–3999Assigned ONVOY, LLC - VA 138E HERNDON VA
2020-05-12 571-520-4XXX 4000–4999Assigned ONVOY, LLC - VA 138E HERNDON VA
2020-05-12 571-520-5XXX 5000–5999Assigned ONVOY, LLC - VA 138E HERNDON VA
2020-05-12 571-771-1XXX 1000–1999Assigned ONVOY, LLC - VA 138E WSNGTNZN08 VA
2020-05-12 571-771-2XXX 2000–2999Assigned ONVOY, LLC - VA 138E WSNGTNZN08 VA
2020-05-12 571-771-3XXX 3000–3999Assigned ONVOY, LLC - VA 138E WSNGTNZN08 VA
2020-05-12 571-771-4XXX 4000–4999Assigned ONVOY, LLC - VA 138E WSNGTNZN08 VA
2020-05-12 571-771-5XXX 5000–5999Assigned ONVOY, LLC - VA 138E WSNGTNZN08 VA
2020-05-12 571-771-6XXX 6000–6999Assigned ONVOY, LLC - VA 138E WSNGTNZN08 VA
2020-05-11 571-998-1XXX 1000–1999Assigned ONVOY, LLC - VA 138E INDENDNTHL VA
2020-05-11 571-998-2XXX 2000–2999Assigned ONVOY, LLC - VA 138E INDENDNTHL VA
2020-05-08 571-413-8XXX 8000–8999Assigned VONAGE AMERICA LLC 197D DULLES VA
2020-05-08 571-413-9XXX 9000–9999Assigned VONAGE AMERICA LLC 197D DULLES VA
2020-05-08 571-487-0XXX 0000–0999Assigned VONAGE AMERICA LLC 197D ARCOLA VA
2020-05-08 571-487-1XXX 1000–1999Assigned VONAGE AMERICA LLC 197D ARCOLA VA
2020-05-07 571-430-4XXX 4000–4999Assigned VONAGE AMERICA LLC 197D HERNDON VA
2020-05-07 571-430-6XXX 6000–6999Assigned VONAGE AMERICA LLC 197D HERNDON VA
2020-05-07 571-453-2XXX 2000–2999Assigned VONAGE AMERICA LLC 197D WSNGTNZN17 VA
2020-05-07 571-453-3XXX 3000–3999Assigned VONAGE AMERICA LLC 197D WSNGTNZN17 VA
2020-05-06 571-415-5XXX 5000–5999Assigned ONVOY, LLC - VA 138E HAYMARKET VA
2020-05-06 571-415-6XXX 6000–6999Assigned ONVOY, LLC - VA 138E HAYMARKET VA
2020-05-06 571-415-7XXX 7000–7999Assigned ONVOY, LLC - VA 138E HAYMARKET VA
2020-05-06 571-450-1XXX 1000–1999Assigned ONVOY, LLC - VA 138E LORTON VA
2020-05-06 571-450-2XXX 2000–2999Assigned ONVOY, LLC - VA 138E LORTON VA
2020-05-06 571-463-2XXX 2000–2999Assigned ONVOY, LLC - VA 138E ARCOLA VA
2020-05-06 571-463-3XXX 3000–3999Assigned ONVOY, LLC - VA 138E ARCOLA VA
2020-05-06 571-467-8XXX 8000–8999Assigned VONAGE AMERICA LLC 197D WSNGTNZN08 VA
2020-05-06 571-467-9XXX 9000–9999Assigned VONAGE AMERICA LLC 197D WSNGTNZN08 VA
2020-05-06 571-496-5XXX 5000–5999Assigned ONVOY, LLC - VA 138E LORTONMTRO VA
2020-05-06 571-496-6XXX 6000–6999Assigned ONVOY, LLC - VA 138E LORTONMTRO VA
2020-05-06 571-554-1XXX 1000–1999Assigned ONVOY, LLC - VA 138E DALE CITY VA
2020-05-06 571-554-2XXX 2000–2999Assigned ONVOY, LLC - VA 138E DALE CITY VA
2020-05-06 571-554-3XXX 3000–3999Assigned ONVOY, LLC - VA 138E DALE CITY VA
2020-05-06 571-554-4XXX 4000–4999Assigned ONVOY, LLC - VA 138E DALE CITY VA
2020-05-01 571-496-1XXX 1000–1999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G LORTONMTRO VA
2020-04-28 571-430-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 HERNDON VA
2020-04-21 571-453-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2020-04-21 571-453-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2020-04-21 571-461-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2020-04-15 571-413-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DULLES VA
2020-04-15 571-413-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DULLES VA
2020-04-15 571-413-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DULLES VA
2020-04-10 571-467-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN08 VA
2020-04-09 571-460-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN19 VA
2020-04-09 571-460-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN19 VA
2020-04-09 571-460-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN19 VA
2020-04-09 571-460-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN19 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.