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
2019-11-19 667-868-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 CRISFIELD MD
2019-11-14 667-257-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 COLUMBIA MD
2019-11-01 667-275-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 TOWSON MD
2019-11-01 667-275-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 TOWSON MD
2019-10-23 667-900-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2019-10-23 667-900-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2019-10-23 667-900-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2019-10-23 667-900-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2019-10-23 667-900-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2019-10-18 667-262-6XXX 6000–6999Assigned ONVOY, LLC - MD 876D BALTIMORE MD
2019-10-18 667-262-7XXX 7000–7999Assigned ONVOY, LLC - MD 876D BALTIMORE MD
2019-10-15 667-346-2XXX 2000–2999Assigned CSC WIRELESS, LLC 425J SALISBURY MD
2019-10-11 667-274-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ELKRIDGE MD
2019-10-11 667-274-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ELKRIDGE MD
2019-10-11 667-660-6XXX 6000–6999Assigned ONVOY, LLC - MD 876D MARION MD
2019-10-11 667-660-7XXX 7000–7999Assigned ONVOY, LLC - MD 876D MARION MD
2019-10-11 667-661-6XXX 6000–6999Assigned ONVOY, LLC - MD 876D SNOW HILL MD
2019-10-11 667-661-7XXX 7000–7999Assigned ONVOY, LLC - MD 876D SNOW HILL MD
2019-10-11 667-662-6XXX 6000–6999Assigned ONVOY, LLC - MD 876D SMITH IS MD
2019-10-11 667-662-7XXX 7000–7999Assigned ONVOY, LLC - MD 876D SMITH IS MD
2019-10-11 667-663-6XXX 6000–6999Assigned ONVOY, LLC - MD 876D OCEAN CITY MD
2019-10-11 667-663-7XXX 7000–7999Assigned ONVOY, LLC - MD 876D OCEAN CITY MD
2019-10-11 667-664-6XXX 6000–6999Assigned ONVOY, LLC - MD 876D TRAPPE MD
2019-10-11 667-664-7XXX 7000–7999Assigned ONVOY, LLC - MD 876D TRAPPE MD
2019-10-10 667-273-2XXX 2000–2999Assigned CSC WIRELESS, LLC 425J PIKESVILLE MD
2019-10-10 667-345-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CATONSVL MD
2019-10-02 667-270-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J ANNAPOLIS MD
2019-09-24 667-776-9XXX 9000–9999Assigned HD CARRIER LLC 321J BALTIMORE MD
2019-09-18 667-272-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WESTMINSTR MD
2019-09-18 667-272-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WESTMINSTR MD
2019-09-18 667-272-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WESTMINSTR MD
2019-09-18 667-272-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WESTMINSTR MD
2019-09-18 667-272-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WESTMINSTR MD
2019-09-16 667-353-9XXX 9000–9999Assigned CORETEL MARYLAND, INC. - MD 469J CARDIFF MD
2019-09-16 667-853-9XXX 9000–9999Assigned CORETEL MARYLAND, INC. - MD 469J POCOMOKE MD
2019-09-13 667-270-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 ANNAPOLIS MD
2019-09-03 667-271-1XXX 1000–1999Assigned EXIANT COMMUNICATIONS LLC 114J SALISBURY MD
2019-08-28 667-336-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BEL AIR MD
2019-08-14 667-802-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 CATONSVL MD
2019-08-01 667-321-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 PRINCEFRCK MD
2019-07-15 667-230-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC.- MD 2593 CENTREVL MD
2019-07-15 667-230-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC.- MD 2593 CENTREVL MD
2019-07-15 667-243-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC.- MD 2593 OXFORD MD
2019-07-15 667-245-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC.- MD 2593 CECILTON MD
2019-07-15 667-247-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC.- MD 2593 CHESAPKECY MD
2019-07-15 667-248-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC.- MD 2593 DENTON MD
2019-07-15 667-249-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC.- MD 2593 GALENA MD
2019-07-15 667-260-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F BALTIMORE MD
2019-07-15 667-262-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F BALTIMORE MD
2019-07-15 667-262-2XXX 2000–2999Assigned 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.