NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

5 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 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
2008-09-12 240-206-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNG236Z14 MD
2008-09-12 240-330-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN2 MD
2008-09-12 240-330-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN2 MD
2008-09-12 240-342-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ASHTON236 MD
2008-09-12 240-439-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 FREDERICK MD
2008-09-12 240-469-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F HAGERSTOWN MD
2008-09-11 240-509-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 WSNG238Z14 MD
2008-09-11 240-512-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 WSNG238Z13 MD
2008-09-09 240-457-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 FREDERICK MD
2008-09-09 240-507-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSHNGTNZN2 MD
2008-09-03 240-319-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL238 MD
2008-09-03 240-439-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 FREDERICK MD
2008-09-03 240-561-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LEONARDTN MD
2008-09-03 240-691-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSHNGTNZN5 MD
2008-09-03 240-818-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 MYERSVILLE MD
2008-08-21 240-310-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HAGERSTOWN MD
2008-08-15 240-439-2XXX 2000–2999Assigned VERIZON MARYLAND, INC. 9212 FREDERICK MD
2008-08-14 240-492-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN5 MD
2008-08-14 240-619-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN5 MD
2008-08-13 240-938-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ASHTON236 MD
2008-08-08 240-629-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J FREDERICK MD
2008-08-07 240-347-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F HAGERSTOWN MD
2008-08-04 240-419-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WALDORF MD
2008-08-04 240-561-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LEONARDTN MD
2008-08-04 240-566-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F FREDERICK MD
2008-08-01 240-249-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 MECHANCSVL MD
2008-08-01 240-627-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. - MD 281E WSNGTNZN11 MD
2008-08-01 240-627-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. - MD 281E WSNGTNZN11 MD
2008-08-01 240-880-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. - MD 281E WSNGTNZN11 MD
2008-08-01 240-880-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. - MD 281E WSNGTNZN11 MD
2008-07-21 240-330-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN2 MD
2008-07-21 240-330-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN2 MD
2008-07-21 240-547-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 LAUREL236 MD
2008-07-10 240-561-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LEONARDTN MD
2008-07-09 240-654-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. - MD 281E GAITHERSBG MD
2008-07-09 240-654-9XXX 9000–9999Assigned YMAX COMMUNICATIONS CORP. - MD 281E GAITHERSBG MD
2008-07-08 240-345-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 ASHTON238 MD
2008-07-07 240-522-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CUMBERLAND MD
2008-07-07 240-654-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 GAITHERSBG MD
2008-07-03 240-581-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL236 MD
2008-06-23 240-581-6XXX 6000–6999Assigned VERIZON MARYLAND, INC. 9212 LAUREL236 MD
2008-06-23 240-581-7XXX 7000–7999Assigned VERIZON MARYLAND, INC. 9212 LAUREL236 MD
2008-06-17 240-421-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN10 MD
2008-06-17 240-469-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HAGERSTOWN MD
2008-06-17 240-586-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 FREDERICK MD
2008-06-17 240-646-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 LAUREL236 MD
2008-06-17 240-778-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN10 MD
2008-06-16 240-295-2XXX 2000–2999Assigned VERIZON MARYLAND, INC. 9212 LAUREL236 MD
2008-06-09 240-319-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL238 MD
2008-06-09 240-439-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 FREDERICK MD

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.