NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

5 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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
2012-08-09 240-630-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN2 MD
2012-08-09 240-670-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN3 MD
2012-08-09 240-670-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN3 MD
2012-08-09 240-670-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN3 MD
2012-08-09 240-670-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN3 MD
2012-08-08 240-630-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN2 MD
2012-08-08 240-630-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN2 MD
2012-08-08 240-630-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN2 MD
2012-08-08 240-865-3XXX 3000–3999Assigned ONVOY, LLC - MD 876D WSNG238Z14 MD
2012-08-02 240-842-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSNG238Z14 MD
2012-07-18 240-800-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSHNGTNZN2 MD
2012-07-16 240-686-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F GAITHERSBG MD
2012-07-12 240-772-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 FREDERICK MD
2012-06-27 240-800-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSHNGTNZN2 MD
2012-06-27 240-800-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSHNGTNZN2 MD
2012-06-21 240-288-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MD 7325 THURMONT MD
2012-06-21 240-341-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MD 7325 BUCKEYSTN MD
2012-06-21 240-559-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ASHTON236 MD
2012-06-21 240-559-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ASHTON236 MD
2012-06-18 240-307-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F EMMITSBURG MD
2012-06-18 240-428-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSNGTNZN10 MD
2012-06-18 240-512-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSNG238Z13 MD
2012-06-12 240-554-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J LAUREL236 MD
2012-06-07 240-707-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J HAGERSTOWN MD
2012-06-05 240-712-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL238 MD
2012-06-05 240-712-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL238 MD
2012-06-01 240-651-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J FREDERICK MD
2012-05-29 240-249-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F MECHANCSVL MD
2012-05-24 240-803-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F CUMBERLAND MD
2012-05-18 240-488-1XXX 1000–1999Assigned SHENTEL COMMUNICATIONS, LLC. - MD 836G OAKLAND MD
2012-05-16 240-573-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 WSNG236Z15 MD
2012-05-15 240-204-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSHNGTNZN2 MD
2012-05-15 240-204-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSHNGTNZN2 MD
2012-05-14 240-670-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN3 MD
2012-05-14 240-803-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F CUMBERLAND MD
2012-05-04 240-313-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 HAGERSTOWN MD
2012-05-04 240-383-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSHNGTNZN2 MD
2012-05-04 240-578-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 FREDERICK MD
2012-05-04 240-585-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WALDORF MD
2012-05-04 240-585-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WALDORF MD
2012-05-04 240-585-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WALDORF MD
2012-05-04 240-707-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 HAGERSTOWN MD
2012-04-16 240-713-3XXX 3000–3999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G LAUREL236 MD
2012-04-13 240-788-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 WSHNGTNZN5 MD
2012-04-06 240-613-0XXX 0000–0999Assigned US LEC OF MARYLAND, INC. 2589 WSHNGTNZN4 MD
2012-04-06 240-613-1XXX 1000–1999Assigned US LEC OF MARYLAND, INC. 2589 WSHNGTNZN4 MD
2012-04-06 240-613-2XXX 2000–2999Assigned US LEC OF MARYLAND, INC. 2589 WSHNGTNZN4 MD
2012-04-06 240-613-3XXX 3000–3999Assigned US LEC OF MARYLAND, INC. 2589 WSHNGTNZN4 MD
2012-04-06 240-613-4XXX 4000–4999Assigned US LEC OF MARYLAND, INC. 2589 WSHNGTNZN4 MD
2012-04-06 240-613-5XXX 5000–5999Assigned US LEC OF MARYLAND, INC. 2589 WSHNGTNZN4 MD

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.