NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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, all time — NPA 301
PEERLESS NETWORK OF MARYLAND, LLC 40
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
2020-03-23 301-591-6XXX 6000–6999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G GAITHERSBG MD
2020-03-23 301-939-0XXX 0000–0999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSNG236Z13 MD
2020-03-23 301-973-6XXX 6000–6999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSNG238Z14 MD
2020-03-17 301-719-5XXX 5000–5999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSNGTNZN16 MD
2020-02-17 301-444-6XXX 6000–6999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSNGTNZN10 MD
2019-11-29 301-307-5XXX 5000–5999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSNG238Z13 MD
2019-11-18 301-579-0XXX 0000–0999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G BRANDYWINE MD
2019-02-07 301-962-2XXX 2000–2999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSNGTNZN11 MD
2018-10-22 301-973-3XXX 3000–3999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSNG238Z14 MD
2016-10-26 301-298-7XXX 7000–7999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSNG236Z15 MD
2016-10-26 301-715-8XXX 8000–8999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSNG236Z15 MD
2015-05-13 301-747-0XXX 0000–0999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSHNGTNZN6 MD
2013-10-01 301-965-8XXX 8000–8999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSHNGTNZN6 MD
2013-04-09 301-494-8XXX 8000–8999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSNG238Z15 MD
2013-04-09 301-494-9XXX 9000–9999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSNG238Z15 MD
2013-04-04 301-298-1XXX 1000–1999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSNG236Z15 MD
2013-04-04 301-298-8XXX 8000–8999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSNG236Z15 MD
2013-04-04 301-329-0XXX 0000–0999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G ASHTON238 MD
2013-04-04 301-329-1XXX 1000–1999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G ASHTON238 MD
2013-04-04 301-349-1XXX 1000–1999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G POOLESVL MD
2013-04-04 301-364-9XXX 9000–9999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSHNGTNZN4 MD
2013-04-04 301-383-8XXX 8000–8999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSNG236Z14 MD
2013-04-04 301-383-9XXX 9000–9999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSNG236Z14 MD
2013-04-04 301-618-0XXX 0000–0999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSHNGTNZN4 MD
2013-04-04 301-679-6XXX 6000–6999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSNGTNZN12 MD
2013-04-04 301-690-8XXX 8000–8999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G LEONARDTN MD
2013-04-04 301-690-9XXX 9000–9999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G LEONARDTN MD
2013-04-04 301-691-5XXX 5000–5999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G POOLESVL MD
2013-04-04 301-708-0XXX 0000–0999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G LAUREL238 MD
2013-04-04 301-708-2XXX 2000–2999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G LAUREL238 MD
2013-04-04 301-720-0XXX 0000–0999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G BRANDYWINE MD
2013-04-04 301-720-1XXX 1000–1999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G BRANDYWINE MD
2013-04-04 301-804-0XXX 0000–0999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G ASHTON236 MD
2013-04-04 301-804-1XXX 1000–1999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G ASHTON236 MD
2013-04-04 301-880-9XXX 9000–9999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G LXTNPKGRML MD
2013-04-04 301-917-9XXX 9000–9999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSNGTNZN10 MD
2013-04-04 301-966-0XXX 0000–0999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSNGTNZN12 MD
2013-04-04 301-994-7XXX 7000–7999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G LXTNPKGRML MD
2012-08-22 301-971-0XXX 0000–0999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSHNGTNZN6 MD
2012-03-09 301-888-8XXX 8000–8999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSNGTNZN16 MD

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.