NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

17 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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 443
ONVOY, LLC - MD 8
NEW CINGULAR WIRELESS PCS, LLC - DC 4
VERSATEL LLC 1
OPENTACT INC. 1
LEVEL 3 COMMUNICATIONS, LLC - MD 1
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
2012-09-25 443-906-5XXX 5000–5999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G SEVERNA PK MD
2012-09-25 443-906-6XXX 6000–6999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G SEVERNA PK MD
2012-09-25 443-993-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 ELKTON MD
2012-09-17 443-275-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 TOWSON MD
2012-09-17 443-275-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J TOWSON MD
2012-09-17 443-637-7XXX 7000–7999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G ARGRGBSNIS MD
2012-09-17 443-637-8XXX 8000–8999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G ARGRGBSNIS MD
2012-09-17 443-637-9XXX 9000–9999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G ARGRGBSNIS MD
2012-09-14 443-219-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F PARKVILLE MD
2012-09-14 443-501-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F PIKESVILLE MD
2012-09-14 443-672-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F PARKTON MD
2012-09-13 443-201-7XXX 7000–7999Assigned ONVOY, LLC - MD 876D WESTMINSTR MD
2012-09-13 443-294-7XXX 7000–7999Assigned ONVOY, LLC - MD 876D WEST RIVER MD
2012-09-13 443-296-5XXX 5000–5999Assigned ONVOY, LLC - MD 876D WATERLO238 MD
2012-09-13 443-429-1XXX 1000–1999Assigned ONVOY, LLC - MD 876D WOODLAWN MD
2012-09-13 443-767-4XXX 4000–4999Assigned ONVOY, LLC - MD 876D WORTHINGTN MD
2012-09-13 443-937-2XXX 2000–2999Assigned ONVOY, LLC - MD 876D UNION BDG MD
2012-09-13 443-993-1XXX 1000–1999Assigned METROPCS, INC. 5562 ELKTON MD
2012-09-12 443-272-4XXX 4000–4999Assigned ONVOY, LLC - MD 876D RANDALLSTN MD
2012-09-12 443-273-5XXX 5000–5999Assigned ONVOY, LLC - MD 876D REISTERSTN MD
2012-09-12 443-317-2XXX 2000–2999Assigned ONVOY, LLC - MD 876D CHASE MD
2012-09-12 443-390-7XXX 7000–7999Assigned ONVOY, LLC - MD 876D CHURCHVL MD
2012-09-12 443-399-2XXX 2000–2999Assigned ONVOY, LLC - MD 876D DUNDALK MD
2012-09-12 443-424-6XXX 6000–6999Assigned ONVOY, LLC - MD 876D CARDIFF MD
2012-09-12 443-501-2XXX 2000–2999Assigned ONVOY, LLC - MD 876D PIKESVILLE MD
2012-09-12 443-568-3XXX 3000–3999Assigned ONVOY, LLC - MD 876D ARBUTUS MD
2012-09-12 443-594-6XXX 6000–6999Assigned ONVOY, LLC - MD 876D SPARROWSPT MD
2012-09-12 443-595-9XXX 9000–9999Assigned ONVOY, LLC - MD 876D SPARKSGLNC MD
2012-09-12 443-637-6XXX 6000–6999Assigned ONVOY, LLC - MD 876D ARGRGBSNIS MD
2012-09-12 443-660-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J PIKESVILLE MD
2012-09-12 443-732-3XXX 3000–3999Assigned ONVOY, LLC - MD 876D SILVER RUN MD
2012-09-12 443-747-7XXX 7000–7999Assigned ONVOY, LLC - MD 876D PT DEPOSIT MD
2012-09-12 443-903-2XXX 2000–2999Assigned ONVOY, LLC - MD 876D BEL AIR MD
2012-09-12 443-968-7XXX 7000–7999Assigned ONVOY, LLC - MD 876D PRINCEFRCK MD
2012-09-12 443-971-3XXX 3000–3999Assigned ONVOY, LLC - MD 876D TANEYTOWN MD
2012-09-11 443-266-9XXX 9000–9999Assigned ONVOY, LLC - MD 876D GLENWOOD MD
2012-09-11 443-290-5XXX 5000–5999Assigned ONVOY, LLC - MD 876D PARKVILLE MD
2012-09-11 443-396-2XXX 2000–2999Assigned ONVOY, LLC - MD 876D ODENTON MD
2012-09-11 443-402-3XXX 3000–3999Assigned ONVOY, LLC - MD 876D EDGEWOOD MD
2012-09-11 443-491-9XXX 9000–9999Assigned ONVOY, LLC - MD 876D PARKTON MD
2012-09-11 443-494-2XXX 2000–2999Assigned ONVOY, LLC - MD 876D MILLERSVL MD
2012-09-11 443-499-9XXX 9000–9999Assigned ONVOY, LLC - MD 876D JARRETTSVL MD
2012-09-11 443-508-7XXX 7000–7999Assigned ONVOY, LLC - MD 876D HAMPSTEAD MD
2012-09-11 443-550-7XXX 7000–7999Assigned ONVOY, LLC - MD 876D NORTHBEACH MD
2012-09-11 443-648-9XXX 9000–9999Assigned ONVOY, LLC - MD 876D ESSEX MD
2012-09-11 443-764-8XXX 8000–8999Assigned ONVOY, LLC - MD 876D GLENBURNIE MD
2012-09-11 443-843-0XXX 0000–0999Assigned ONVOY, LLC - MD 876D HAVREGRACE MD
2012-09-11 443-892-7XXX 7000–7999Assigned ONVOY, LLC - MD 876D NEWWINDSOR MD
2012-09-11 443-941-0XXX 0000–0999Assigned ONVOY, LLC - MD 876D ELKTON MD
2012-09-11 443-981-2XXX 2000–2999Assigned ONVOY, LLC - MD 876D FALLSTON MD

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.