NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

0 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, all time — NPA 302
IP HORIZON LLC 60
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
2017-05-31 302-567-0XXX 0000–0999Assigned IP HORIZON LLC 515J REHOBOTH DE
2017-05-31 302-608-8XXX 8000–8999Assigned IP HORIZON LLC 515J DOVER DE
2016-02-11 302-219-9XXX 9000–9999Assigned IP HORIZON LLC 515J GREENWOOD DE
2016-02-11 302-232-9XXX 9000–9999Assigned IP HORIZON LLC 515J BRIDGEVL DE
2016-02-11 302-316-9XXX 9000–9999Assigned IP HORIZON LLC 515J MILLSBORO DE
2016-02-11 302-366-9XXX 9000–9999Assigned IP HORIZON LLC 515J NEWARK DE
2016-02-11 302-402-9XXX 9000–9999Assigned IP HORIZON LLC 515J OCEAN VIEW DE
2016-02-11 302-404-9XXX 9000–9999Assigned IP HORIZON LLC 515J SEAFORD DE
2016-02-11 302-408-9XXX 9000–9999Assigned IP HORIZON LLC 515J HOLLY OAK DE
2016-02-11 302-466-8XXX 8000–8999Assigned IP HORIZON LLC 515J DELMAR DE
2016-02-11 302-501-9XXX 9000–9999Assigned IP HORIZON LLC 515J NEW CASTLE DE
2016-02-11 302-508-8XXX 8000–8999Assigned IP HORIZON LLC 515J SMYRNA DE
2016-02-11 302-509-0XXX 0000–0999Assigned IP HORIZON LLC 515J HOCKESSIN DE
2016-02-11 302-515-9XXX 9000–9999Assigned IP HORIZON LLC 515J GEORGETOWN DE
2016-02-11 302-570-8XXX 8000–8999Assigned IP HORIZON LLC 515J HARTLY DE
2016-02-11 302-578-0XXX 0000–0999Assigned IP HORIZON LLC 515J GUMBORO DE
2016-02-11 302-601-8XXX 8000–8999Assigned IP HORIZON LLC 515J DELAWARECY DE
2016-02-11 302-664-0XXX 0000–0999Assigned IP HORIZON LLC 515J MILTON DE
2016-02-11 302-696-8XXX 8000–8999Assigned IP HORIZON LLC 515J MIDDLETOWN DE
2016-02-11 302-715-9XXX 9000–9999Assigned IP HORIZON LLC 515J LAUREL DE
2016-02-11 302-827-0XXX 0000–0999Assigned IP HORIZON LLC 515J LEWES DE
2016-02-11 302-865-9XXX 9000–9999Assigned IP HORIZON LLC 515J FREDERICA DE
2016-02-11 302-870-8XXX 8000–8999Assigned IP HORIZON LLC 515J FELTON DE
2016-02-11 302-922-9XXX 9000–9999Assigned IP HORIZON LLC 515J CAMDEN DE
2016-02-11 302-924-9XXX 9000–9999Assigned IP HORIZON LLC 515J HARRINGTON DE
2016-02-11 302-927-5XXX 5000–5999Assigned IP HORIZON LLC 515J DAGSBORO DE
2016-02-11 302-966-1XXX 1000–1999Assigned IP HORIZON LLC 515J ANGOLA DE
2016-02-10 302-425-1XXX 1000–1999Assigned IP HORIZON LLC 515J WILMINGTON DE
2015-09-11 302-956-3XXX 3000–3999Assigned IP HORIZON LLC 515J BRIDGEVL DE
2014-11-03 302-318-7XXX 7000–7999Assigned IP HORIZON LLC 515J NEWARK DE
2014-11-03 302-772-7XXX 7000–7999Assigned IP HORIZON LLC 515J WILMINGTON DE
2014-05-29 302-508-1XXX 1000–1999Assigned IP HORIZON LLC 515J SMYRNA DE
2014-05-23 302-721-8XXX 8000–8999Assigned IP HORIZON LLC 515J BRIDGEVL DE
2014-05-22 302-212-1XXX 1000–1999Assigned IP HORIZON LLC 515J REHOBOTH DE
2014-05-22 302-213-8XXX 8000–8999Assigned IP HORIZON LLC 515J DOVER DE
2014-05-22 302-217-9XXX 9000–9999Assigned IP HORIZON LLC 515J GEORGETOWN DE
2014-05-22 302-219-8XXX 8000–8999Assigned IP HORIZON LLC 515J GREENWOOD DE
2014-05-22 302-273-9XXX 9000–9999Assigned IP HORIZON LLC 515J NEWARK DE
2014-05-22 302-281-8XXX 8000–8999Assigned IP HORIZON LLC 515J HOLLY OAK DE
2014-05-22 302-307-8XXX 8000–8999Assigned IP HORIZON LLC 515J HOCKESSIN DE
2014-05-22 302-313-8XXX 8000–8999Assigned IP HORIZON LLC 515J LEWES DE
2014-05-22 302-314-8XXX 8000–8999Assigned IP HORIZON LLC 515J MIDDLETOWN DE
2014-05-22 302-316-8XXX 8000–8999Assigned IP HORIZON LLC 515J MILLSBORO DE
2014-05-22 302-317-8XXX 8000–8999Assigned IP HORIZON LLC 515J NEW CASTLE DE
2014-05-22 302-364-8XXX 8000–8999Assigned IP HORIZON LLC 515J DAGSBORO DE
2014-05-22 302-387-8XXX 8000–8999Assigned IP HORIZON LLC 515J CAMDEN DE
2014-05-22 302-402-8XXX 8000–8999Assigned IP HORIZON LLC 515J OCEAN VIEW DE
2014-05-22 302-404-8XXX 8000–8999Assigned IP HORIZON LLC 515J SEAFORD DE
2014-05-22 302-440-8XXX 8000–8999Assigned IP HORIZON LLC 515J DELAWARECY DE
2014-05-22 302-481-8XXX 8000–8999Assigned IP HORIZON LLC 515J GUMBORO DE

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.