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
2019-02-20 667-227-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC.- MD 2593 SALISBURY MD
2019-02-20 667-227-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC.- MD 2593 SALISBURY MD
2019-02-20 667-227-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC.- MD 2593 SALISBURY MD
2019-02-20 667-245-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC.- MD 2593 CECILTON MD
2019-02-20 667-247-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC.- MD 2593 CHESAPKECY MD
2019-02-20 667-247-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC.- MD 2593 CHESAPKECY MD
2019-02-20 667-247-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC.- MD 2593 CHESAPKECY MD
2019-02-20 667-247-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC.- MD 2593 CHESAPKECY MD
2019-02-20 667-253-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC.- MD 2593 SALISBURY MD
2019-02-20 667-253-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC.- MD 2593 SALISBURY MD
2019-02-20 667-266-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC.- MD 2593 SALISBURY MD
2019-02-20 667-266-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC.- MD 2593 SALISBURY MD
2019-02-20 667-266-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC.- MD 2593 SALISBURY MD
2019-02-20 667-266-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC.- MD 2593 SALISBURY MD
2019-02-20 667-344-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC.- MD 2593 CHASE MD
2019-02-20 667-900-0XXX 0000–0999Assigned TERRA NOVA TELECOM INC. 145J BALTIMORE MD
2019-02-11 667-226-8XXX 8000–8999Assigned ONVOY, LLC - MD 876D STMICHAELS MD
2019-02-11 667-226-9XXX 9000–9999Assigned ONVOY, LLC - MD 876D STMICHAELS MD
2019-02-11 667-241-8XXX 8000–8999Assigned ONVOY, LLC - MD 876D RIDGELY MD
2019-02-11 667-241-9XXX 9000–9999Assigned ONVOY, LLC - MD 876D RIDGELY MD
2019-02-11 667-242-8XXX 8000–8999Assigned ONVOY, LLC - MD 876D ROCK HALL MD
2019-02-11 667-242-9XXX 9000–9999Assigned ONVOY, LLC - MD 876D ROCK HALL MD
2019-02-11 667-364-8XXX 8000–8999Assigned ONVOY, LLC - MD 876D STEVENSVL MD
2019-02-11 667-364-9XXX 9000–9999Assigned ONVOY, LLC - MD 876D STEVENSVL MD
2019-02-11 667-545-8XXX 8000–8999Assigned ONVOY, LLC - MD 876D WARWICK MD
2019-02-11 667-545-9XXX 9000–9999Assigned ONVOY, LLC - MD 876D WARWICK MD
2019-02-11 667-727-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 SUDLERSVL MD
2019-02-11 667-727-8XXX 8000–8999Assigned ONVOY, LLC - MD 876D SUDLERSVL MD
2019-02-11 667-727-9XXX 9000–9999Assigned ONVOY, LLC - MD 876D SUDLERSVL MD
2019-02-07 667-837-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F PT DEPOSIT MD
2019-02-07 667-837-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F PT DEPOSIT MD
2019-02-07 667-837-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F PT DEPOSIT MD
2019-02-07 667-837-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F PT DEPOSIT MD
2019-02-07 667-837-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F PT DEPOSIT MD
2019-02-07 667-837-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F PT DEPOSIT MD
2019-02-07 667-866-2XXX 2000–2999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G DARLINGTON MD
2019-02-06 667-220-8XXX 8000–8999Assigned ONVOY, LLC - MD 876D GREENSBORO MD
2019-02-06 667-220-9XXX 9000–9999Assigned ONVOY, LLC - MD 876D GREENSBORO MD
2019-02-06 667-230-8XXX 8000–8999Assigned ONVOY, LLC - MD 876D CENTREVL MD
2019-02-06 667-230-9XXX 9000–9999Assigned ONVOY, LLC - MD 876D CENTREVL MD
2019-02-06 667-236-8XXX 8000–8999Assigned ONVOY, LLC - MD 876D PERRYVILLE MD
2019-02-06 667-236-9XXX 9000–9999Assigned ONVOY, LLC - MD 876D PERRYVILLE MD
2019-02-06 667-238-8XXX 8000–8999Assigned ONVOY, LLC - MD 876D PRESTON MD
2019-02-06 667-238-9XXX 9000–9999Assigned ONVOY, LLC - MD 876D PRESTON MD
2019-02-06 667-243-8XXX 8000–8999Assigned ONVOY, LLC - MD 876D OXFORD MD
2019-02-06 667-243-9XXX 9000–9999Assigned ONVOY, LLC - MD 876D OXFORD MD
2019-02-06 667-244-8XXX 8000–8999Assigned ONVOY, LLC - MD 876D STILL POND MD
2019-02-06 667-244-9XXX 9000–9999Assigned ONVOY, LLC - MD 876D STILL POND MD
2019-02-06 667-245-8XXX 8000–8999Assigned ONVOY, LLC - MD 876D CECILTON MD
2019-02-06 667-245-9XXX 9000–9999Assigned ONVOY, LLC - MD 876D CECILTON 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.