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
2010-07-23 240-452-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 HAGERSTOWN MD
2010-07-21 240-245-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSNG236Z14 MD
2010-07-21 240-245-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSNG236Z14 MD
2010-07-21 240-316-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN2 MD
2010-07-21 240-348-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSNGTNZN16 MD
2010-07-21 240-348-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSNGTNZN16 MD
2010-07-21 240-408-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSNGTNZN10 MD
2010-07-21 240-408-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSNGTNZN10 MD
2010-07-21 240-542-6XXX 6000–6999Assigned IP HORIZON LLC 515J WSNG236Z13 MD
2010-07-21 240-542-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSNG236Z13 MD
2010-07-21 240-545-7XXX 7000–7999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSNG236Z15 MD
2010-07-21 240-545-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSNG236Z15 MD
2010-07-21 240-558-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSNGTNZN11 MD
2010-07-21 240-558-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSNGTNZN11 MD
2010-07-21 240-671-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN2 MD
2010-07-21 240-704-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN3 MD
2010-07-21 240-704-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN3 MD
2010-07-20 240-435-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WALDORF MD
2010-07-20 240-466-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F MECHANCSVL MD
2010-07-20 240-583-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F LAUREL236 MD
2010-07-20 240-718-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F LXTNPKGRML MD
2010-07-20 240-804-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F TOMPKINSVL MD
2010-07-20 240-986-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F NANJEMOY MD
2010-07-19 240-745-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F DAMASCS236 MD
2010-07-19 240-837-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F HUGHESVL MD
2010-07-19 240-848-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F GAITHERSBG MD
2010-07-16 240-389-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F ASHTON236 MD
2010-07-16 240-685-8XXX 8000–8999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G BRANDYWINE MD
2010-07-15 240-232-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSNG236Z14 MD
2010-07-15 240-257-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F NANJEMOY MD
2010-07-15 240-257-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F NANJEMOY MD
2010-07-15 240-583-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F LAUREL236 MD
2010-07-14 240-406-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J WSNGTNZN10 MD
2010-07-09 240-394-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F MOUNT AIRY MD
2010-07-08 240-938-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ASHTON236 MD
2010-07-07 240-431-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 LXTNPKGRML MD
2010-07-07 240-431-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 LXTNPKGRML MD
2010-07-06 240-435-3XXX 3000–3999Assigned METROPCS, INC. 5562 WALDORF MD
2010-07-06 240-435-6XXX 6000–6999Assigned METROPCS, INC. 5562 WALDORF MD
2010-07-06 240-439-5XXX 5000–5999Assigned METROPCS, INC. 5562 FREDERICK MD
2010-07-06 240-439-7XXX 7000–7999Assigned METROPCS, INC. 5562 FREDERICK MD
2010-06-21 240-841-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J LAUREL238 MD
2010-06-11 240-342-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ASHTON236 MD
2010-06-11 240-440-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 FREDERICK MD
2010-06-11 240-640-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WALDORF MD
2010-06-04 240-439-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J FREDERICK MD
2010-06-03 240-319-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL238 MD
2010-06-03 240-319-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL238 MD
2010-06-03 240-385-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 MYERSVILLE MD
2010-06-03 240-435-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WALDORF 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.