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
2006-07-21 240-753-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN10 MD
2006-07-21 240-753-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN10 MD
2006-07-17 240-329-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HAGERSTOWN MD
2006-07-17 240-345-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J ASHTON238 MD
2006-07-17 240-390-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ASHTON236 MD
2006-07-17 240-454-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 GAITHERSBG MD
2006-07-17 240-454-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 GAITHERSBG MD
2006-07-14 240-607-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J WALDORF MD
2006-07-14 240-607-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J WALDORF MD
2006-07-13 240-567-0XXX 0000–0999Assigned VERIZON MARYLAND, INC. 9212 WSNGTNZN10 MD
2006-07-13 240-567-1XXX 1000–1999Assigned VERIZON MARYLAND, INC. 9212 WSNGTNZN10 MD
2006-07-13 240-567-2XXX 2000–2999Assigned VERIZON MARYLAND, INC. 9212 WSNGTNZN10 MD
2006-07-13 240-567-3XXX 3000–3999Assigned VERIZON MARYLAND, INC. 9212 WSNGTNZN10 MD
2006-07-13 240-567-4XXX 4000–4999Assigned VERIZON MARYLAND, INC. 9212 WSNGTNZN10 MD
2006-07-13 240-567-5XXX 5000–5999Assigned VERIZON MARYLAND, INC. 9212 WSNGTNZN10 MD
2006-07-13 240-567-6XXX 6000–6999Assigned VERIZON MARYLAND, INC. 9212 WSNGTNZN10 MD
2006-07-13 240-567-7XXX 7000–7999Assigned VERIZON MARYLAND, INC. 9212 WSNGTNZN10 MD
2006-07-13 240-567-8XXX 8000–8999Assigned VERIZON MARYLAND, INC. 9212 WSNGTNZN10 MD
2006-07-13 240-567-9XXX 9000–9999Assigned VERIZON MARYLAND, INC. 9212 WSNGTNZN10 MD
2006-07-12 240-377-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 INDIANHEAD MD
2006-07-12 240-751-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 GAITHERSBG MD
2006-07-12 240-751-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 GAITHERSBG MD
2006-07-06 240-434-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LEONARDTN MD
2006-07-06 240-778-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSNGTNZN10 MD
2006-07-06 240-778-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSNGTNZN10 MD
2006-07-06 240-778-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSNGTNZN10 MD
2006-07-06 240-778-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSNGTNZN10 MD
2006-07-06 240-778-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSNGTNZN10 MD
2006-07-05 240-280-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J LAUREL236 MD
2006-07-05 240-280-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J LAUREL236 MD
2006-07-03 240-284-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 FROSTBURG MD
2006-06-26 240-667-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J WSHNGTNZN4 MD
2006-06-26 240-667-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J WSHNGTNZN4 MD
2006-06-21 240-362-6XXX 6000–6999Assigned USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 4720 CUMBERLAND MD
2006-06-19 240-357-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 FREDERICK MD
2006-06-19 240-688-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSHNGTNZN3 MD
2006-06-19 240-688-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSHNGTNZN3 MD
2006-06-16 240-293-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 WSNGTNZN12 MD
2006-06-14 240-715-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN10 MD
2006-06-07 240-242-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN11 MD
2006-06-07 240-242-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN11 MD
2006-06-07 240-863-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN3 MD
2006-06-05 240-273-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN6 MD
2006-06-02 240-529-9XXX 9000–9999Assigned METROPCS, INC. 5562 FREDERICK MD
2006-06-02 240-753-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSNGTNZN10 MD
2006-06-02 240-753-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSNGTNZN10 MD
2006-06-02 240-753-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSNGTNZN10 MD
2006-05-31 240-342-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 ASHTON236 MD
2006-05-31 240-681-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 BRANDYWINE MD
2006-05-24 240-681-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J BRANDYWINE 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.