NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

12 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 531
ONVOY, LLC - NE 3
MIDSTATES DATA TRANSPORT, LLC - NE 2
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE 2
INTRADO COMMUNICATIONS, LLC 1
BOOST SUBSCRIBERCO L.L.C. 1
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
2021-02-11 531-251-4XXX 4000–4999Assigned ONVOY, LLC - NE 549E DAWSON NE
2021-02-11 531-251-5XXX 5000–5999Assigned ONVOY, LLC - NE 549E DAWSON NE
2021-02-11 531-252-7XXX 7000–7999Assigned ONVOY, LLC - NE 549E CRESTON NE
2021-02-11 531-252-8XXX 8000–8999Assigned ONVOY, LLC - NE 549E CRESTON NE
2021-02-11 531-321-5XXX 5000–5999Assigned ONVOY, LLC - NE 549E ADAMS NE
2021-02-11 531-321-6XXX 6000–6999Assigned ONVOY, LLC - NE 549E ADAMS NE
2021-02-11 531-331-6XXX 6000–6999Assigned ONVOY, LLC - NE 549E MARTELL NE
2021-02-11 531-331-7XXX 7000–7999Assigned ONVOY, LLC - NE 549E MARTELL NE
2021-02-11 531-414-6XXX 6000–6999Assigned ONVOY, LLC - NE 549E MADISON NE
2021-02-11 531-414-8XXX 8000–8999Assigned ONVOY, LLC - NE 549E MADISON NE
2021-02-11 531-459-3XXX 3000–3999Assigned ONVOY, LLC - NE 549E UTICA NE
2021-02-11 531-459-4XXX 4000–4999Assigned ONVOY, LLC - NE 549E UTICA NE
2021-02-11 531-519-4XXX 4000–4999Assigned ONVOY, LLC - NE 549E WAYNE NE
2021-02-11 531-519-7XXX 7000–7999Assigned ONVOY, LLC - NE 549E WAYNE NE
2021-02-11 531-535-6XXX 6000–6999Assigned ONVOY, LLC - NE 549E KENESAW NE
2021-02-11 531-535-7XXX 7000–7999Assigned ONVOY, LLC - NE 549E KENESAW NE
2021-02-11 531-559-0XXX 0000–0999Assigned QWEST CORPORATION 9631 OMAHA NE
2021-02-11 531-559-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - NE 3233 OMAHA NE
2021-02-11 531-559-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NE 3233 OMAHA NE
2021-02-11 531-559-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - NE 3233 OMAHA NE
2021-02-11 531-559-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - NE 3233 OMAHA NE
2021-02-11 531-559-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - NE 3233 OMAHA NE
2021-02-11 531-559-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NE 3233 OMAHA NE
2021-02-11 531-559-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NE 3233 OMAHA NE
2021-02-11 531-559-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - NE 3233 OMAHA NE
2021-02-11 531-559-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - NE 3233 OMAHA NE
2021-02-11 531-571-4XXX 4000–4999Assigned ONVOY, LLC - NE 549E WAKEFIELD NE
2021-02-11 531-571-6XXX 6000–6999Assigned ONVOY, LLC - NE 549E WAKEFIELD NE
2021-02-11 531-888-6XXX 6000–6999Assigned ONVOY, LLC - NE 549E O NEILL NE
2021-02-11 531-900-3XXX 3000–3999Assigned ONVOY, LLC - NE 549E WEST POINT NE
2021-02-11 531-900-4XXX 4000–4999Assigned ONVOY, LLC - NE 549E WEST POINT NE
2021-02-10 531-202-6XXX 6000–6999Assigned ONVOY, LLC - NE 549E OAKLAND NE
2021-02-10 531-202-8XXX 8000–8999Assigned ONVOY, LLC - NE 549E OAKLAND NE
2021-02-10 531-216-9XXX 9000–9999Assigned ONVOY, LLC - NE 549E SCHUYLER NE
2021-02-05 531-248-1XXX 1000–1999Assigned METROPCS, INC. 5562 LINCOLN NE
2021-02-03 531-242-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H OMAHA NE
2021-02-03 531-242-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H OMAHA NE
2021-02-03 531-272-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H OMAHA NE
2021-02-03 531-272-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H OMAHA NE
2021-02-03 531-895-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H OMAHA NE
2021-02-03 531-895-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H OMAHA NE
2021-01-30 531-256-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J OMAHA NE
2021-01-30 531-256-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J OMAHA NE
2021-01-30 531-256-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J OMAHA NE
2021-01-30 531-256-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J OMAHA NE
2021-01-30 531-256-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J OMAHA NE
2021-01-30 531-256-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J OMAHA NE
2021-01-30 531-256-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J OMAHA NE
2021-01-30 531-256-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J OMAHA NE
2021-01-30 531-256-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J OMAHA NE

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.