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
2010-09-23 240-402-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNG236Z13 MD
2010-09-23 240-402-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNG236Z13 MD
2010-09-23 240-402-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNG236Z13 MD
2010-09-17 240-207-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F DAMASCS236 MD
2010-09-17 240-221-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSNGTNZN11 MD
2010-09-17 240-232-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSNG236Z14 MD
2010-09-17 240-249-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F MECHANCSVL MD
2010-09-17 240-326-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSNG236Z15 MD
2010-09-17 240-356-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F MYERSVILLE MD
2010-09-17 240-406-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSNGTNZN10 MD
2010-09-17 240-490-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F MIDDLETOWN MD
2010-09-17 240-523-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F LA PLATA MD
2010-09-17 240-619-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN5 MD
2010-09-17 240-704-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN3 MD
2010-09-02 240-319-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL238 MD
2010-08-30 240-348-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN16 MD
2010-08-26 240-264-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 LAUREL236 MD
2010-08-26 240-389-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ASHTON236 MD
2010-08-26 240-389-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ASHTON236 MD
2010-08-06 240-406-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN10 MD
2010-08-06 240-406-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN10 MD
2010-08-06 240-612-0XXX 0000–0999Assigned LEVEL 3 TELECOM OF MARYLAND, LLC - MD 7591 WSHNGTNZN5 MD
2010-08-06 240-612-1XXX 1000–1999Assigned LEVEL 3 TELECOM OF MARYLAND, LLC - MD 7591 WSHNGTNZN5 MD
2010-08-06 240-612-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF MARYLAND, LLC - MD 7591 WSHNGTNZN5 MD
2010-08-06 240-612-3XXX 3000–3999Assigned LEVEL 3 TELECOM OF MARYLAND, LLC - MD 7591 WSHNGTNZN5 MD
2010-08-06 240-612-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF MARYLAND, LLC - MD 7591 WSHNGTNZN5 MD
2010-08-06 240-612-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF MARYLAND, LLC - MD 7591 WSHNGTNZN5 MD
2010-08-06 240-612-6XXX 6000–6999Assigned LEVEL 3 TELECOM OF MARYLAND, LLC - MD 7591 WSHNGTNZN5 MD
2010-08-06 240-612-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF MARYLAND, LLC - MD 7591 WSHNGTNZN5 MD
2010-08-06 240-612-8XXX 8000–8999Assigned LEVEL 3 TELECOM OF MARYLAND, LLC - MD 7591 WSHNGTNZN5 MD
2010-08-06 240-612-9XXX 9000–9999Assigned LEVEL 3 TELECOM OF MARYLAND, LLC - MD 7591 WSHNGTNZN5 MD
2010-08-05 240-288-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F THURMONT MD
2010-08-05 240-341-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F BUCKEYSTN MD
2010-08-05 240-366-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WILLIAMSPT MD
2010-08-05 240-580-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F CUMBERLAND MD
2010-08-04 240-244-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSNGTNZN16 MD
2010-08-04 240-389-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F ASHTON236 MD
2010-08-04 240-587-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F LEONARDTN MD
2010-08-04 240-718-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F LXTNPKGRML MD
2010-08-03 240-583-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LAUREL236 MD
2010-07-30 240-347-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F HAGERSTOWN MD
2010-07-30 240-408-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J WSNGTNZN10 MD
2010-07-29 240-229-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WALDORF MD
2010-07-29 240-435-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WALDORF MD
2010-07-29 240-435-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WALDORF MD
2010-07-29 240-640-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WALDORF MD
2010-07-28 240-459-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL236 MD
2010-07-27 240-684-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 WSNG236Z13 MD
2010-07-26 240-319-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LAUREL238 MD
2010-07-26 240-705-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSHNGTNZN3 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.