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
2014-07-10 240-495-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN4 MD
2014-06-24 240-762-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 WSHNGTNZN2 MD
2014-06-24 240-841-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL238 MD
2014-06-17 240-309-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LEONARDTN MD
2014-06-17 240-309-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LEONARDTN MD
2014-06-17 240-309-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LEONARDTN MD
2014-06-17 240-458-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WALDORF MD
2014-06-17 240-495-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSHNGTNZN4 MD
2014-06-17 240-608-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 FREDERICK MD
2014-06-16 240-801-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J GAITHERSBG MD
2014-06-13 240-241-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J WSNG236Z13 MD
2014-06-10 240-495-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 WSHNGTNZN4 MD
2014-06-10 240-762-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 WSHNGTNZN2 MD
2014-06-05 240-342-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ASHTON236 MD
2014-06-05 240-342-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ASHTON236 MD
2014-06-05 240-437-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ASHTON236 MD
2014-05-30 240-360-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J LAUREL236 MD
2014-05-29 240-800-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J WSHNGTNZN2 MD
2014-05-28 240-512-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 WSNG238Z13 MD
2014-05-28 240-772-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 FREDERICK MD
2014-05-28 240-929-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J WSNG236Z14 MD
2014-05-27 240-686-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J GAITHERSBG MD
2014-05-27 240-782-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J DAMASCS236 MD
2014-05-27 240-801-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J GAITHERSBG MD
2014-05-27 240-901-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LA PLATA MD
2014-05-27 240-903-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J INDIANHEAD MD
2014-05-23 240-509-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WSNG238Z14 MD
2014-05-22 240-495-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSHNGTNZN4 MD
2014-05-22 240-532-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSHNGTNZN5 MD
2014-05-22 240-772-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 FREDERICK MD
2014-05-22 240-772-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 FREDERICK MD
2014-05-16 240-366-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 WILLIAMSPT MD
2014-05-16 240-837-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HUGHESVL MD
2014-05-14 240-258-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J RIDGE MD
2014-05-14 240-339-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WSNG236Z15 MD
2014-05-14 240-466-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MECHANCSVL MD
2014-05-14 240-503-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J TOMPKINSVL MD
2014-05-14 240-712-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LAUREL238 MD
2014-05-14 240-837-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HUGHESVL MD
2014-05-12 240-224-1XXX 1000–1999Assigned METROPCS, INC. 5562 GAITHERSBG MD
2014-05-07 240-232-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSNG236Z14 MD
2014-05-07 240-334-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSNG236Z14 MD
2014-05-07 240-509-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSNG238Z14 MD
2014-05-07 240-516-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSNGTNZN12 MD
2014-05-02 240-203-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F HAGERSTOWN MD
2014-05-02 240-203-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F HAGERSTOWN MD
2014-05-02 240-532-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN5 MD
2014-05-02 240-532-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN5 MD
2014-05-02 240-532-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN5 MD
2014-05-02 240-532-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN5 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.