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
2020-11-02 667-237-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WEST RIVER MD
2020-11-02 667-653-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F BRYNPKLNCM MD
2020-10-30 667-295-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F CROFTON MD
2020-10-29 667-895-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MD 7325 BALTIMORE MD
2020-10-26 667-232-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 GLENBURNIE MD
2020-10-16 667-895-8XXX 8000–8999Assigned TWILIO INTERNATIONAL, INC. 506J BALTIMORE MD
2020-10-14 667-299-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANNAPOLIS MD
2020-10-14 667-299-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANNAPOLIS MD
2020-10-14 667-299-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANNAPOLIS MD
2020-10-07 667-294-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 TOWSON MD
2020-10-01 667-290-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F BALTIMORE MD
2020-10-01 667-290-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F BALTIMORE MD
2020-10-01 667-290-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F BALTIMORE MD
2020-10-01 667-290-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F BALTIMORE MD
2020-10-01 667-290-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F BALTIMORE MD
2020-09-30 667-230-5XXX 5000–5999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G CENTREVL MD
2020-09-30 667-274-0XXX 0000–0999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G ELKRIDGE MD
2020-09-30 667-288-0XXX 0000–0999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G BERLIN MD
2020-09-30 667-353-0XXX 0000–0999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G CARDIFF MD
2020-09-23 667-296-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 REISTERSTN MD
2020-09-23 667-296-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 REISTERSTN MD
2020-09-23 667-296-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 REISTERSTN MD
2020-09-22 667-293-3XXX 3000–3999Assigned ONVOY, LLC - MD 876D SHARPTOWN MD
2020-09-22 667-293-9XXX 9000–9999Assigned ONVOY, LLC - MD 876D SHARPTOWN MD
2020-09-22 667-294-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 TOWSON MD
2020-09-22 667-294-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 TOWSON MD
2020-09-22 667-294-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 TOWSON MD
2020-09-22 667-294-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 TOWSON MD
2020-09-22 667-294-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 TOWSON MD
2020-09-22 667-676-6XXX 6000–6999Assigned ONVOY, LLC - MD 876D WILLARDS MD
2020-09-22 667-676-7XXX 7000–7999Assigned ONVOY, LLC - MD 876D WILLARDS MD
2020-09-17 667-265-2XXX 2000–2999Assigned ONVOY, LLC - MD 876D VIENNA MD
2020-09-17 667-660-4XXX 4000–4999Assigned ONVOY, LLC - MD 876D MARION MD
2020-09-17 667-660-5XXX 5000–5999Assigned ONVOY, LLC - MD 876D MARION MD
2020-09-10 667-254-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 CHESTERTN MD
2020-09-10 667-290-1XXX 1000–1999Assigned IP HORIZON LLC 515J BALTIMORE MD
2020-09-10 667-292-1XXX 1000–1999Assigned IP HORIZON LLC 515J SALISBURY MD
2020-09-04 667-287-1XXX 1000–1999Assigned NUSO, LLC 478J BISHOPVL MD
2020-09-04 667-288-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 BERLIN MD
2020-09-04 667-289-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ABERDEEN MD
2020-09-04 667-289-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ABERDEEN MD
2020-09-04 667-289-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ABERDEEN MD
2020-09-01 667-262-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F BALTIMORE MD
2020-09-01 667-284-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F BALTIMORE MD
2020-09-01 667-284-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F BALTIMORE MD
2020-09-01 667-402-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F BALTIMORE MD
2020-09-01 667-653-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F BRYNPKLNCM MD
2020-09-01 667-653-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F BRYNPKLNCM MD
2020-09-01 667-900-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F BALTIMORE MD
2020-09-01 667-900-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F 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.