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
2010-11-03 240-770-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN4 MD
2010-11-03 240-780-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F GAITHERSBG MD
2010-10-29 240-216-5XXX 5000–5999Assigned METROPCS, INC. 5562 WALDORF MD
2010-10-27 240-436-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 BUCKEYSTN MD
2010-10-27 240-500-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J HAGERSTOWN MD
2010-10-25 240-427-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WALDORF MD
2010-10-25 240-542-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSNG236Z13 MD
2010-10-25 240-560-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSNGTNZN12 MD
2010-10-19 240-257-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F NANJEMOY MD
2010-10-19 240-844-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F RIDGE MD
2010-10-15 240-200-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - MD 281E WSHNGTNZN2 MD
2010-10-15 240-200-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. - MD 281E WSHNGTNZN2 MD
2010-10-15 240-200-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. - MD 281E WSHNGTNZN2 MD
2010-10-15 240-200-9XXX 9000–9999Assigned YMAX COMMUNICATIONS CORP. - MD 281E WSHNGTNZN2 MD
2010-10-06 240-200-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN2 MD
2010-09-29 240-480-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN2 MD
2010-09-29 240-480-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN2 MD
2010-09-29 240-480-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN2 MD
2010-09-29 240-480-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN2 MD
2010-09-29 240-480-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN2 MD
2010-09-29 240-480-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN2 MD
2010-09-29 240-480-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN2 MD
2010-09-29 240-480-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN2 MD
2010-09-29 240-480-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN2 MD
2010-09-29 240-480-9XXX 9000–9999Assigned METROPCS, INC. 5562 WSHNGTNZN2 MD
2010-09-28 240-244-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSNGTNZN16 MD
2010-09-28 240-283-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSNGTNZN11 MD
2010-09-28 240-292-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSNGTNZN11 MD
2010-09-28 240-293-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSNGTNZN12 MD
2010-09-28 240-319-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F LAUREL238 MD
2010-09-28 240-382-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F HAGERSTOWN MD
2010-09-28 240-391-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSNG236Z13 MD
2010-09-28 240-406-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSNGTNZN10 MD
2010-09-28 240-419-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WALDORF MD
2010-09-28 240-583-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F LAUREL236 MD
2010-09-28 240-587-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F LEONARDTN MD
2010-09-28 240-685-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F BRANDYWINE MD
2010-09-28 240-705-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN3 MD
2010-09-28 240-705-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN3 MD
2010-09-28 240-720-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F GAITHERSBG MD
2010-09-28 240-788-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN5 MD
2010-09-28 240-920-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F CUMBERLAND MD
2010-09-24 240-704-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN3 MD
2010-09-23 240-402-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNG236Z13 MD
2010-09-23 240-402-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNG236Z13 MD
2010-09-23 240-402-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNG236Z13 MD
2010-09-23 240-402-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNG236Z13 MD
2010-09-23 240-402-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNG236Z13 MD
2010-09-23 240-402-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNG236Z13 MD
2010-09-23 240-402-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNG236Z13 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.