NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

17 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 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
2013-04-04 443-313-9XXX 9000–9999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G FORK MD
2013-04-04 443-384-0XXX 0000–0999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G PARKVILLE MD
2013-04-04 443-384-1XXX 1000–1999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G PARKVILLE MD
2013-04-04 443-391-8XXX 8000–8999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G COCKEYSVL MD
2013-04-04 443-391-9XXX 9000–9999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G COCKEYSVL MD
2013-04-04 443-405-8XXX 8000–8999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G RANDALLSTN MD
2013-04-04 443-405-9XXX 9000–9999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G RANDALLSTN MD
2013-04-04 443-409-8XXX 8000–8999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G EDGEWOOD MD
2013-04-04 443-409-9XXX 9000–9999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G EDGEWOOD MD
2013-04-04 443-441-0XXX 0000–0999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G GLENWOOD MD
2013-04-04 443-441-1XXX 1000–1999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G GLENWOOD MD
2013-04-04 443-483-1XXX 1000–1999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G CARDIFF MD
2013-04-04 443-483-2XXX 2000–2999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G CARDIFF MD
2013-04-04 443-489-1XXX 1000–1999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G CHASE MD
2013-04-04 443-489-8XXX 8000–8999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G CHASE MD
2013-04-04 443-508-5XXX 5000–5999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G HAMPSTEAD MD
2013-04-04 443-508-9XXX 9000–9999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G HAMPSTEAD MD
2013-04-04 443-530-0XXX 0000–0999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G DUNDALK MD
2013-04-04 443-530-1XXX 1000–1999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G DUNDALK MD
2013-04-04 443-558-1XXX 1000–1999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G ABERDEEN MD
2013-04-04 443-558-9XXX 9000–9999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G ABERDEEN MD
2013-04-04 443-598-8XXX 8000–8999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G SHERWD FOR MD
2013-04-04 443-598-9XXX 9000–9999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G SHERWD FOR MD
2013-04-04 443-641-0XXX 0000–0999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G PIKESVILLE MD
2013-04-04 443-641-8XXX 8000–8999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G PIKESVILLE MD
2013-04-04 443-643-0XXX 0000–0999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G BEL AIR MD
2013-04-04 443-643-9XXX 9000–9999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G BEL AIR MD
2013-04-04 443-672-6XXX 6000–6999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G PARKTON MD
2013-04-04 443-672-7XXX 7000–7999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G PARKTON MD
2013-04-04 443-719-8XXX 8000–8999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G JARRETTSVL MD
2013-04-04 443-719-9XXX 9000–9999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G JARRETTSVL MD
2013-04-04 443-732-7XXX 7000–7999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G SILVER RUN MD
2013-04-04 443-732-8XXX 8000–8999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G SILVER RUN MD
2013-04-04 443-741-8XXX 8000–8999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G COLUMBIA MD
2013-04-04 443-741-9XXX 9000–9999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G COLUMBIA MD
2013-04-04 443-747-8XXX 8000–8999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G PT DEPOSIT MD
2013-04-04 443-747-9XXX 9000–9999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G PT DEPOSIT MD
2013-04-04 443-748-2XXX 2000–2999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G MILLERSVL MD
2013-04-04 443-748-4XXX 4000–4999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G MILLERSVL MD
2013-04-04 443-771-8XXX 8000–8999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G PRINCEFRCK MD
2013-04-04 443-771-9XXX 9000–9999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G PRINCEFRCK MD
2013-04-04 443-833-8XXX 8000–8999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G ARBUTUS MD
2013-04-04 443-833-9XXX 9000–9999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G ARBUTUS MD
2013-04-04 443-843-1XXX 1000–1999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G HAVREGRACE MD
2013-04-04 443-843-2XXX 2000–2999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G HAVREGRACE MD
2013-04-04 443-868-1XXX 1000–1999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G ESSEX MD
2013-04-04 443-868-9XXX 9000–9999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G ESSEX MD
2013-04-04 443-881-8XXX 8000–8999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G REISTERSTN MD
2013-04-04 443-881-9XXX 9000–9999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G REISTERSTN MD
2013-04-04 443-892-8XXX 8000–8999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G NEWWINDSOR 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.