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 240
YMAX COMMUNICATIONS CORP. - MD 50
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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2010-11-17 240-706-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. - MD 281E WSHNGTNZN3 MD
2010-11-17 240-706-9XXX 9000–9999Assigned YMAX COMMUNICATIONS CORP. - MD 281E WSHNGTNZN3 MD
2010-10-15 240-200-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - MD 281E WSHNGTNZN2 MD
2010-10-15 240-200-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. - MD 281E WSHNGTNZN2 MD
2010-10-15 240-200-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. - MD 281E WSHNGTNZN2 MD
2010-10-15 240-200-9XXX 9000–9999Assigned YMAX COMMUNICATIONS CORP. - MD 281E WSHNGTNZN2 MD
2009-07-14 240-324-3XXX 3000–3999Assigned YMAX COMMUNICATIONS CORP. - MD 281E ASHTON238 MD
2009-07-14 240-324-4XXX 4000–4999Assigned YMAX COMMUNICATIONS CORP. - MD 281E ASHTON238 MD
2009-07-14 240-324-5XXX 5000–5999Assigned YMAX COMMUNICATIONS CORP. - MD 281E ASHTON238 MD
2009-07-14 240-654-5XXX 5000–5999Assigned YMAX COMMUNICATIONS CORP. - MD 281E GAITHERSBG MD
2009-07-14 240-654-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - MD 281E GAITHERSBG MD
2009-03-12 240-347-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - MD 281E HAGERSTOWN MD
2009-03-12 240-347-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. - MD 281E HAGERSTOWN MD
2009-03-12 240-347-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. - MD 281E HAGERSTOWN MD
2009-03-12 240-347-9XXX 9000–9999Assigned YMAX COMMUNICATIONS CORP. - MD 281E HAGERSTOWN MD
2009-03-04 240-356-5XXX 5000–5999Assigned YMAX COMMUNICATIONS CORP. - MD 281E MYERSVILLE MD
2009-03-04 240-356-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - MD 281E MYERSVILLE MD
2009-03-04 240-385-3XXX 3000–3999Assigned YMAX COMMUNICATIONS CORP. - MD 281E MYERSVILLE MD
2009-03-04 240-442-3XXX 3000–3999Assigned YMAX COMMUNICATIONS CORP. - MD 281E OAKLAND MD
2009-03-04 240-442-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - MD 281E OAKLAND MD
2009-03-03 240-469-3XXX 3000–3999Assigned YMAX COMMUNICATIONS CORP. - MD 281E HAGERSTOWN MD
2009-03-03 240-920-3XXX 3000–3999Assigned YMAX COMMUNICATIONS CORP. - MD 281E CUMBERLAND MD
2009-03-03 240-920-5XXX 5000–5999Assigned YMAX COMMUNICATIONS CORP. - MD 281E CUMBERLAND MD
2009-03-03 240-979-3XXX 3000–3999Assigned YMAX COMMUNICATIONS CORP. - MD 281E CUMBERLAND MD
2009-03-03 240-979-5XXX 5000–5999Assigned YMAX COMMUNICATIONS CORP. - MD 281E CUMBERLAND MD
2008-12-18 240-415-0XXX 0000–0999Assigned YMAX COMMUNICATIONS CORP. - MD 281E FREDERICK MD
2008-12-18 240-415-1XXX 1000–1999Assigned YMAX COMMUNICATIONS CORP. - MD 281E FREDERICK MD
2008-12-18 240-415-2XXX 2000–2999Assigned YMAX COMMUNICATIONS CORP. - MD 281E FREDERICK MD
2008-12-18 240-415-3XXX 3000–3999Assigned YMAX COMMUNICATIONS CORP. - MD 281E FREDERICK MD
2008-12-18 240-415-4XXX 4000–4999Assigned YMAX COMMUNICATIONS CORP. - MD 281E FREDERICK MD
2008-10-09 240-324-0XXX 0000–0999Assigned YMAX COMMUNICATIONS CORP. - MD 281E ASHTON238 MD
2008-10-09 240-324-1XXX 1000–1999Assigned YMAX COMMUNICATIONS CORP. - MD 281E ASHTON238 MD
2008-10-09 240-324-2XXX 2000–2999Assigned YMAX COMMUNICATIONS CORP. - MD 281E ASHTON238 MD
2008-09-24 240-330-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - MD 281E WSHNGTNZN2 MD
2008-09-24 240-383-4XXX 4000–4999Assigned YMAX COMMUNICATIONS CORP. - MD 281E WSHNGTNZN2 MD
2008-09-24 240-479-3XXX 3000–3999Assigned YMAX COMMUNICATIONS CORP. - MD 281E WSHNGTNZN2 MD
2008-09-24 240-582-1XXX 1000–1999Assigned YMAX COMMUNICATIONS CORP. - MD 281E WSHNGTNZN4 MD
2008-09-24 240-765-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. - MD 281E WSHNGTNZN5 MD
2008-08-01 240-627-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. - MD 281E WSNGTNZN11 MD
2008-08-01 240-627-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. - MD 281E WSNGTNZN11 MD
2008-08-01 240-880-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. - MD 281E WSNGTNZN11 MD
2008-08-01 240-880-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. - MD 281E WSNGTNZN11 MD
2008-07-09 240-654-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. - MD 281E GAITHERSBG MD
2008-07-09 240-654-9XXX 9000–9999Assigned YMAX COMMUNICATIONS CORP. - MD 281E GAITHERSBG MD
2008-05-29 240-345-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. - MD 281E ASHTON238 MD
2008-05-29 240-345-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. - MD 281E ASHTON238 MD
2008-04-02 240-720-5XXX 5000–5999Assigned YMAX COMMUNICATIONS CORP. - MD 281E GAITHERSBG MD
2008-04-01 240-345-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - MD 281E ASHTON238 MD
2007-07-24 240-345-5XXX 5000–5999Assigned YMAX COMMUNICATIONS CORP. - MD 281E ASHTON238 MD
2007-06-29 240-686-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. - MD 281E GAITHERSBG 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.