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
2019-03-25 240-913-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 DAMASCS240 MD
2019-03-19 240-594-8XXX 8000–8999Assigned ONVOY, LLC - MD 876D BITTINGER MD
2019-03-19 240-594-9XXX 9000–9999Assigned ONVOY, LLC - MD 876D BITTINGER MD
2019-03-15 240-337-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSHNGTNZN5 MD
2019-03-15 240-337-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSHNGTNZN5 MD
2019-03-15 240-337-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSHNGTNZN5 MD
2019-03-15 240-634-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC.- MD 2593 RIDGE MD
2019-03-15 240-634-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC.- MD 2593 RIDGE MD
2019-03-15 240-765-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSHNGTNZN5 MD
2019-03-15 240-867-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSHNGTNZN3 MD
2019-03-15 240-867-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSHNGTNZN3 MD
2019-03-14 240-622-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC.- MD 2593 LA PLATA MD
2019-03-14 240-622-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC.- MD 2593 LA PLATA MD
2019-03-14 240-622-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC.- MD 2593 LA PLATA MD
2019-03-14 240-633-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC.- MD 2593 HUGHESVL MD
2019-03-14 240-647-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC.- MD 2593 CLEAR SPG MD
2019-03-14 240-647-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC.- MD 2593 CLEAR SPG MD
2019-03-14 240-732-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC.- MD 2593 MOUNT AIRY MD
2019-03-14 240-732-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC.- MD 2593 MOUNT AIRY MD
2019-03-14 240-732-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC.- MD 2593 MOUNT AIRY MD
2019-03-14 240-774-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC.- MD 2593 LONACONING MD
2019-03-13 240-787-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC.- MD 2593 BRANDYWINE MD
2019-03-07 240-664-9XXX 9000–9999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G CUMBERLAND MD
2019-03-06 240-588-9XXX 9000–9999Assigned METROPCS, INC. 5562 GRANTSVL MD
2019-03-04 240-588-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC.- MD 2593 GRANTSVL MD
2019-03-04 240-588-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC.- MD 2593 GRANTSVL MD
2019-03-04 240-588-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC.- MD 2593 GRANTSVL MD
2019-03-04 240-588-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC.- MD 2593 GRANTSVL MD
2019-03-04 240-588-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC.- MD 2593 GRANTSVL MD
2019-02-18 240-531-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN3 MD
2019-02-18 240-531-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN3 MD
2019-02-11 240-642-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSNGTNZN10 MD
2019-02-06 240-512-8XXX 8000–8999Assigned ONVOY, LLC - MD 876D WSNG238Z13 MD
2019-02-06 240-512-9XXX 9000–9999Assigned ONVOY, LLC - MD 876D WSNG238Z13 MD
2019-02-06 240-763-5XXX 5000–5999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSNG238Z15 MD
2019-02-06 240-763-7XXX 7000–7999Assigned ONVOY, LLC - MD 876D WSNG238Z15 MD
2019-02-06 240-763-8XXX 8000–8999Assigned ONVOY, LLC - MD 876D WSNG238Z15 MD
2019-02-05 240-628-6XXX 6000–6999Assigned ONVOY, LLC - MD 876D MECHANCSVL MD
2019-02-05 240-628-8XXX 8000–8999Assigned ONVOY, LLC - MD 876D MECHANCSVL MD
2019-02-05 240-634-8XXX 8000–8999Assigned ONVOY, LLC - MD 876D RIDGE MD
2019-02-05 240-634-9XXX 9000–9999Assigned ONVOY, LLC - MD 876D RIDGE MD
2019-01-31 240-659-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ASHTON236 MD
2019-01-31 240-659-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ASHTON236 MD
2019-01-31 240-663-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 MIDDLETOWN MD
2019-01-28 240-596-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ASHTON236 MD
2019-01-23 240-564-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LAUREL236 MD
2019-01-17 240-860-7XXX 7000–7999Assigned USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 4720 CUMBERLAND MD
2019-01-10 240-243-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 GAITHERSBG MD
2019-01-10 240-337-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSHNGTNZN5 MD
2019-01-10 240-598-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HUGHESVL 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.