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
2020-08-13 667-286-8XXX 8000–8999Assigned HD CARRIER LLC 321J SALISBURY MD
2020-08-13 667-286-9XXX 9000–9999Assigned HD CARRIER LLC 321J SALISBURY MD
2020-08-11 667-868-4XXX 4000–4999Assigned CHARTER IP ENABLED SERVICES, LLC 792K CRISFIELD MD
2020-08-06 667-275-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 TOWSON MD
2020-08-03 667-284-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 BALTIMORE MD
2020-08-03 667-284-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 BALTIMORE MD
2020-08-03 667-284-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 BALTIMORE MD
2020-08-03 667-284-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 BALTIMORE MD
2020-08-03 667-284-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 BALTIMORE MD
2020-08-03 667-284-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 BALTIMORE MD
2020-08-03 667-284-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 BALTIMORE MD
2020-07-29 667-230-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 CENTREVL MD
2020-07-28 667-256-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ABERDEEN MD
2020-07-28 667-256-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ABERDEEN MD
2020-07-28 667-256-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ABERDEEN MD
2020-07-28 667-256-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ABERDEEN MD
2020-07-28 667-256-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ABERDEEN MD
2020-07-28 667-653-4XXX 4000–4999Assigned METROPCS, INC. 5562 BRYNPKLNCM MD
2020-07-28 667-842-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WOODLAWN MD
2020-07-22 667-274-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MD 7325 ELKRIDGE MD
2020-07-20 667-577-7XXX 7000–7999Assigned FRACTEL, LLC 965H ELKTON MD
2020-07-20 667-688-8XXX 8000–8999Assigned FRACTEL, LLC 965H PARKVILLE MD
2020-07-20 667-758-6XXX 6000–6999Assigned FRACTEL, LLC 965H SILVER RUN MD
2020-07-20 667-842-5XXX 5000–5999Assigned FRACTEL, LLC 965H WOODLAWN MD
2020-07-15 667-278-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 TOWSON MD
2020-07-15 667-278-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 TOWSON MD
2020-07-14 667-662-1XXX 1000–1999Assigned ONVOY, LLC - MD 876D SMITH IS MD
2020-07-14 667-662-2XXX 2000–2999Assigned ONVOY, LLC - MD 876D SMITH IS MD
2020-07-14 667-663-3XXX 3000–3999Assigned ONVOY, LLC - MD 876D OCEAN CITY MD
2020-07-07 667-283-9XXX 9000–9999Assigned AT&T - LOCAL 7421 FORK MD
2020-07-06 667-977-7XXX 7000–7999Assigned FRACTEL, LLC 965H SALISBURY MD
2020-06-30 667-900-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 BALTIMORE MD
2020-06-26 667-262-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H BALTIMORE MD
2020-06-26 667-262-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H BALTIMORE MD
2020-06-26 667-262-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H BALTIMORE MD
2020-06-24 667-278-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 TOWSON MD
2020-05-29 667-282-1XXX 1000–1999Assigned ONVOY, LLC - MD 876D TILGHMAN MD
2020-05-29 667-282-2XXX 2000–2999Assigned ONVOY, LLC - MD 876D TILGHMAN MD
2020-05-26 667-220-6XXX 6000–6999Assigned ONVOY, LLC - MD 876D GREENSBORO MD
2020-05-26 667-220-7XXX 7000–7999Assigned ONVOY, LLC - MD 876D GREENSBORO MD
2020-05-26 667-261-8XXX 8000–8999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G COLUMBIA MD
2020-05-26 667-321-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PRINCEFRCK MD
2020-05-26 667-321-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PRINCEFRCK MD
2020-05-19 667-262-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 BALTIMORE MD
2020-05-15 667-227-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 SALISBURY MD
2020-05-12 667-279-0XXX 0000–0999Assigned ONVOY, LLC - MD 876D BISHOPVL MD
2020-05-12 667-279-1XXX 1000–1999Assigned ONVOY, LLC - MD 876D BISHOPVL MD
2020-05-12 667-399-0XXX 0000–0999Assigned ONVOY, LLC - MD 876D UNION BDG MD
2020-05-12 667-399-1XXX 1000–1999Assigned ONVOY, LLC - MD 876D UNION BDG MD
2020-05-06 667-280-3XXX 3000–3999Assigned VONAGE AMERICA LLC 197D ELLICOTTCY 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.