NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

70 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 667
NEW CINGULAR WIRELESS PCS, LLC - DC 38
ONVOY, LLC - MD 18
BANDWIDTH.COM CLEC, LLC - MD 6
METROPCS, INC. 2
INTRADO COMMUNICATIONS, LLC 2
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
2016-01-07 667-786-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 COLUMBIA MD
2016-01-07 667-786-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 COLUMBIA MD
2015-12-30 667-701-1XXX 1000–1999Assigned ONVOY, LLC - MD 876D ELKRIDGE MD
2015-12-23 667-367-5XXX 5000–5999Assigned ONVOY, LLC - MD 876D WESTMINSTR MD
2015-12-22 667-200-0XXX 0000–0999Assigned ONVOY, LLC - MD 876D COLUMBIA MD
2015-12-22 667-222-3XXX 3000–3999Assigned ONVOY, LLC - MD 876D ARGRGBSNIS MD
2015-12-22 667-802-1XXX 1000–1999Assigned ONVOY, LLC - MD 876D CATONSVL MD
2015-12-17 667-313-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 PIKESVILLE MD
2015-12-17 667-313-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 PIKESVILLE MD
2015-12-17 667-313-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 PIKESVILLE MD
2015-12-17 667-313-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 PIKESVILLE MD
2015-12-17 667-313-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 PIKESVILLE MD
2015-12-17 667-313-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 PIKESVILLE MD
2015-12-17 667-313-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 PIKESVILLE MD
2015-12-17 667-313-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 PIKESVILLE MD
2015-12-17 667-313-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 PIKESVILLE MD
2015-12-17 667-313-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 PIKESVILLE MD
2015-12-14 667-206-3XXX 3000–3999Assigned ONVOY, LLC - MD 876D TOWSON MD
2015-12-14 667-312-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J BALTIMORE MD
2015-12-14 667-600-6XXX 6000–6999Assigned ONVOY, LLC - MD 876D BALTIMORE MD
2015-12-09 667-786-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 COLUMBIA MD
2015-12-09 667-786-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 COLUMBIA MD
2015-12-09 667-786-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 COLUMBIA MD
2015-12-07 667-206-7XXX 7000–7999Assigned IP HORIZON LLC 515J TOWSON MD
2015-12-07 667-307-9XXX 9000–9999Assigned IP HORIZON LLC 515J CROFTON MD
2015-12-07 667-701-8XXX 8000–8999Assigned IP HORIZON LLC 515J ELKRIDGE MD
2015-12-07 667-771-1XXX 1000–1999Assigned WIDE VOICE, LLC - MD 530H BALTIMORE MD
2015-11-18 667-201-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BEL AIR MD
2015-11-16 667-210-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J BALTIMORE MD
2015-11-12 667-701-0XXX 0000–0999Assigned ONVOY, LLC - MD 876D ELKRIDGE MD
2015-11-05 667-786-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MD 7325 COLUMBIA MD
2015-11-05 667-786-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MD 7325 COLUMBIA MD
2015-11-04 667-312-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 BALTIMORE MD
2015-10-21 667-444-0XXX 0000–0999Assigned IP HORIZON LLC 515J BALTIMORE MD
2015-10-20 667-701-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ELKRIDGE MD
2015-10-14 667-367-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WESTMINSTR MD
2015-10-14 667-930-0XXX 0000–0999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G BALTIMORE MD
2015-10-13 667-770-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2015-10-13 667-770-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2015-10-13 667-770-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2015-10-13 667-770-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2015-10-13 667-770-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2015-10-13 667-770-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2015-10-12 667-228-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F ABERDEEN MD
2015-10-08 667-225-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 ANNAPOLIS MD
2015-09-23 667-600-0XXX 0000–0999Assigned EVOLVE CELLULAR, INC. 139F BALTIMORE MD
2015-09-21 667-206-1XXX 1000–1999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G TOWSON MD
2015-09-17 667-305-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PIKESVILLE MD
2015-09-17 667-305-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PIKESVILLE MD
2015-09-09 667-234-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE 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.