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
2014-12-23 240-903-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F INDIANHEAD MD
2014-12-15 240-618-2XXX 2000–2999Assigned ONVOY, LLC - MD 876D WSNGTNZN10 MD
2014-12-15 240-618-3XXX 3000–3999Assigned ONVOY, LLC - MD 876D WSNGTNZN10 MD
2014-12-12 240-623-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN4 MD
2014-12-12 240-623-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN4 MD
2014-12-10 240-616-5XXX 5000–5999Assigned METROPCS, INC. 5562 WSNG236Z13 MD
2014-12-10 240-616-8XXX 8000–8999Assigned METROPCS, INC. 5562 WSNG236Z13 MD
2014-12-10 240-702-8XXX 8000–8999Assigned METROPCS, INC. 5562 GAITHERSBG MD
2014-12-09 240-618-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN10 MD
2014-12-05 240-495-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSHNGTNZN4 MD
2014-12-05 240-573-6XXX 6000–6999Assigned METROPCS, INC. 5562 WSNG236Z15 MD
2014-12-05 240-573-8XXX 8000–8999Assigned METROPCS, INC. 5562 WSNG236Z15 MD
2014-12-05 240-702-7XXX 7000–7999Assigned METROPCS, INC. 5562 GAITHERSBG MD
2014-11-24 240-641-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J WSHNGTNZN3 MD
2014-11-13 240-341-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J BUCKEYSTN MD
2014-11-13 240-548-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNG236Z14 MD
2014-11-13 240-716-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN5 MD
2014-11-13 240-716-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN5 MD
2014-11-05 240-448-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WALDORF MD
2014-10-29 240-651-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 FREDERICK MD
2014-10-28 240-517-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL238 MD
2014-10-28 240-517-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL238 MD
2014-10-28 240-517-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL238 MD
2014-10-27 240-485-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSHNGTNZN3 MD
2014-10-27 240-641-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSHNGTNZN3 MD
2014-10-27 240-641-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSHNGTNZN3 MD
2014-10-27 240-702-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 GAITHERSBG MD
2014-10-27 240-702-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 GAITHERSBG MD
2014-10-27 240-702-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 GAITHERSBG MD
2014-10-22 240-288-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J THURMONT MD
2014-10-20 240-681-5XXX 5000–5999Assigned METROPCS, INC. 5562 BRANDYWINE MD
2014-10-14 240-503-8XXX 8000–8999Assigned ONVOY, LLC - MD 876D TOMPKINSVL MD
2014-10-14 240-503-9XXX 9000–9999Assigned ONVOY, LLC - MD 876D TOMPKINSVL MD
2014-10-14 240-713-5XXX 5000–5999Assigned ONVOY, LLC - MD 876D LAUREL236 MD
2014-10-14 240-713-6XXX 6000–6999Assigned ONVOY, LLC - MD 876D LAUREL236 MD
2014-10-14 240-823-4XXX 4000–4999Assigned ONVOY, LLC - MD 876D BRANDYWINE MD
2014-10-14 240-823-5XXX 5000–5999Assigned ONVOY, LLC - MD 876D BRANDYWINE MD
2014-10-13 240-618-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN10 MD
2014-10-13 240-618-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN10 MD
2014-10-13 240-708-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 LAUREL238 MD
2014-10-13 240-708-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 LAUREL238 MD
2014-10-13 240-713-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 LAUREL236 MD
2014-10-10 240-453-4XXX 4000–4999Assigned ONVOY, LLC - MD 876D WSNGTNZN10 MD
2014-10-10 240-471-6XXX 6000–6999Assigned ONVOY, LLC - MD 876D WSNGTNZN12 MD
2014-10-10 240-702-1XXX 1000–1999Assigned ONVOY, LLC - MD 876D GAITHERSBG MD
2014-10-10 240-702-2XXX 2000–2999Assigned ONVOY, LLC - MD 876D GAITHERSBG MD
2014-10-09 240-335-2XXX 2000–2999Assigned ONVOY, LLC - MD 876D WSNG236Z14 MD
2014-10-09 240-335-3XXX 3000–3999Assigned ONVOY, LLC - MD 876D WSNG236Z14 MD
2014-10-09 240-624-7XXX 7000–7999Assigned ONVOY, LLC - MD 876D WSNG236Z13 MD
2014-10-09 240-624-9XXX 9000–9999Assigned ONVOY, LLC - MD 876D WSNG236Z13 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.