NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

5 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 240
BANDWIDTH.COM CLEC, LLC - MD 3
OPENTACT INC. 1
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
2005-12-05 240-434-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LEONARDTN MD
2005-12-01 240-464-0XXX 0000–0999Assigned METROPCS, INC. 5562 WSHNGTNZN2 MD
2005-11-23 240-478-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN3 MD
2005-11-23 240-580-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 CUMBERLAND MD
2005-11-17 240-396-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN2 MD
2005-11-17 240-421-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN10 MD
2005-11-15 240-626-2XXX 2000–2999Assigned VERIZON MARYLAND, INC. 9212 FREDERICK MD
2005-11-14 240-312-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 WSHNGTNZN5 MD
2005-11-14 240-312-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 WSHNGTNZN5 MD
2005-11-11 240-478-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN3 MD
2005-11-04 240-581-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 LAUREL236 MD
2005-11-03 240-205-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSNGTNZN10 MD
2005-11-03 240-205-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSNGTNZN10 MD
2005-11-03 240-405-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 FREDERICK MD
2005-11-03 240-405-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 FREDERICK MD
2005-11-03 240-405-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 FREDERICK MD
2005-11-02 240-694-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN2 MD
2005-11-02 240-744-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN2 MD
2005-10-25 240-668-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DAMASCS236 MD
2005-10-25 240-668-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DAMASCS236 MD
2005-10-25 240-668-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DAMASCS236 MD
2005-10-11 240-625-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HAGERSTOWN MD
2005-10-10 240-529-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 FREDERICK MD
2005-10-10 240-821-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN3 MD
2005-10-07 240-320-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WALDORF MD
2005-10-07 240-320-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WALDORF MD
2005-09-29 240-294-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J LAUREL236 MD
2005-09-21 240-454-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J GAITHERSBG MD
2005-09-19 240-329-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F HAGERSTOWN MD
2005-09-12 240-421-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN10 MD
2005-09-12 240-821-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN3 MD
2005-09-07 240-328-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSNGTNZN10 MD
2005-09-07 240-328-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSNGTNZN10 MD
2005-09-07 240-328-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSNGTNZN10 MD
2005-09-02 240-367-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 FREDERICK MD
2005-08-26 240-374-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 LAUREL236 MD
2005-08-26 240-464-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN2 MD
2005-08-26 240-821-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN3 MD
2005-08-23 240-229-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WALDORF MD
2005-08-23 240-405-3XXX 3000–3999Assigned METROPCS, INC. 5562 FREDERICK MD
2005-08-23 240-821-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN3 MD
2005-08-23 240-848-6XXX 6000–6999Assigned METROPCS, INC. 5562 GAITHERSBG MD
2005-08-17 240-273-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN6 MD
2005-08-17 240-374-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 LAUREL236 MD
2005-08-17 240-421-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN10 MD
2005-08-17 240-527-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HAGERSTOWN MD
2005-08-17 240-645-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN3 MD
2005-08-17 240-821-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN3 MD
2005-08-11 240-396-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN2 MD
2005-08-09 240-449-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J GAITHERSBG 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.