NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

1 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 301
ONVOY, LLC - MD 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
2020-10-09 301-835-1XXX 1000–1999Assigned ONVOY, LLC - MD 876D FREDERICK MD
2020-10-09 301-835-2XXX 2000–2999Assigned ONVOY, LLC - MD 876D FREDERICK MD
2020-10-08 301-307-4XXX 4000–4999Assigned ONVOY, LLC - MD 876D WSNG238Z13 MD
2020-10-08 301-307-9XXX 9000–9999Assigned ONVOY, LLC - MD 876D WSNG238Z13 MD
2020-09-17 301-205-5XXX 5000–5999Assigned ONVOY, LLC - MD 876D WSNG238Z14 MD
2020-09-17 301-923-4XXX 4000–4999Assigned ONVOY, LLC - MD 876D WSNG236Z13 MD
2020-09-17 301-923-9XXX 9000–9999Assigned ONVOY, LLC - MD 876D WSNG236Z13 MD
2020-09-17 301-973-5XXX 5000–5999Assigned ONVOY, LLC - MD 876D WSNG238Z14 MD
2020-09-11 301-923-5XXX 5000–5999Assigned METROPCS, INC. 5562 WSNG236Z13 MD
2020-09-01 301-709-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CUMBERLAND MD
2020-08-13 301-708-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F LAUREL238 MD
2020-07-14 301-867-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNG236Z14 MD
2020-07-01 301-936-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HAGERSTOWN MD
2020-05-14 301-578-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN3 MD
2020-05-14 301-578-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN3 MD
2020-05-08 301-701-6XXX 6000–6999Assigned VONAGE AMERICA LLC 197D WSNG236Z13 MD
2020-05-08 301-823-5XXX 5000–5999Assigned VONAGE AMERICA LLC 197D WSNG236Z13 MD
2020-04-08 301-973-4XXX 4000–4999Assigned HD CARRIER LLC 321J WSNG238Z14 MD
2020-04-07 301-307-8XXX 8000–8999Assigned HD CARRIER LLC 321J WSNG238Z13 MD
2020-03-31 301-610-3XXX 3000–3999Assigned ONVOY, LLC - MD 876D WSNGTNZN10 MD
2020-03-31 301-719-2XXX 2000–2999Assigned ONVOY, LLC - MD 876D WSNGTNZN16 MD
2020-03-31 301-719-3XXX 3000–3999Assigned ONVOY, LLC - MD 876D WSNGTNZN16 MD
2020-03-31 301-756-5XXX 5000–5999Assigned ONVOY, LLC - MD 876D WSNG236Z14 MD
2020-03-23 301-591-6XXX 6000–6999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G GAITHERSBG MD
2020-03-23 301-939-0XXX 0000–0999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSNG236Z13 MD
2020-03-23 301-973-6XXX 6000–6999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSNG238Z14 MD
2020-03-17 301-719-5XXX 5000–5999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSNGTNZN16 MD
2020-02-17 301-444-6XXX 6000–6999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSNGTNZN10 MD
2020-01-16 301-444-9XXX 9000–9999Assigned TELNYX LLC 073H WSNGTNZN10 MD
2020-01-14 301-709-5XXX 5000–5999Assigned ONVOY, LLC - MD 876D CUMBERLAND MD
2020-01-14 301-709-6XXX 6000–6999Assigned ONVOY, LLC - MD 876D CUMBERLAND MD
2020-01-14 301-709-7XXX 7000–7999Assigned ONVOY, LLC - MD 876D CUMBERLAND MD
2020-01-14 301-709-8XXX 8000–8999Assigned ONVOY, LLC - MD 876D CUMBERLAND MD
2019-12-10 301-859-6XXX 6000–6999Assigned ONVOY, LLC - MD 876D OAKLAND MD
2019-12-10 301-859-7XXX 7000–7999Assigned ONVOY, LLC - MD 876D OAKLAND MD
2019-12-09 301-709-3XXX 3000–3999Assigned ONVOY, LLC - MD 876D CUMBERLAND MD
2019-12-09 301-709-4XXX 4000–4999Assigned ONVOY, LLC - MD 876D CUMBERLAND MD
2019-11-29 301-307-5XXX 5000–5999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSNG238Z13 MD
2019-11-18 301-579-0XXX 0000–0999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G BRANDYWINE MD
2019-11-05 301-433-9XXX 9000–9999Assigned METROPCS, INC. 5562 WSHNGTNZN5 MD
2019-11-05 301-835-3XXX 3000–3999Assigned METROPCS, INC. 5562 FREDERICK MD
2019-10-10 301-416-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 MYERSVILLE MD
2019-10-01 301-636-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSHNGTNZN5 MD
2019-09-19 301-242-1XXX 1000–1999Assigned METROPCS, INC. 5562 BRANDYWINE MD
2019-09-12 301-835-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 FREDERICK MD
2019-09-03 301-835-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 FREDERICK MD
2019-08-12 301-941-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN2 MD
2019-08-06 301-624-0XXX 0000–0999Assigned METROPCS, INC. 5562 FREDERICK MD
2019-07-15 301-501-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC.- MD 2593 OAKLAND MD
2019-07-15 301-501-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC.- MD 2593 OAKLAND MD

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.