NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

0 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, all time — NPA 630
RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 22
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
2017-02-21 630-590-7XXX 7000–7999Assigned RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 8702 HINSDALE IL
2014-12-11 630-526-2XXX 2000–2999Assigned RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 8702 BATAVIA IL
2008-03-19 630-312-1XXX 1000–1999Assigned RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 8702 LEMONT IL
2007-11-14 630-339-9XXX 9000–9999Assigned RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 8702 ROSELLE IL
2007-07-10 630-219-3XXX 3000–3999Assigned RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 8702 NAPERVILLE IL
2007-07-10 630-219-4XXX 4000–4999Assigned RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 8702 NAPERVILLE IL
2007-07-10 630-219-5XXX 5000–5999Assigned RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 8702 NAPERVILLE IL
2007-07-10 630-219-6XXX 6000–6999Assigned RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 8702 NAPERVILLE IL
2007-07-10 630-219-7XXX 7000–7999Assigned RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 8702 NAPERVILLE IL
2007-07-05 630-246-9XXX 9000–9999Assigned RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 8702 BARTLETT IL
2007-07-05 630-315-4XXX 4000–4999Assigned RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 8702 WHEATON IL
2007-07-05 630-403-2XXX 2000–2999Assigned RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 8702 GLEN ELLYN IL
2007-07-05 630-519-2XXX 2000–2999Assigned RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 8702 LOMBARD IL
2007-07-05 630-815-0XXX 0000–0999Assigned RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 8702 W CHICAGO IL
2006-06-21 630-445-5XXX 5000–5999Assigned RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 8702 NAPERVILLE IL
2006-04-19 630-396-4XXX 4000–4999Assigned RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 8702 LOMBARD IL
2004-09-22 630-550-4XXX 4000–4999Assigned RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 8702 BARTLETT IL
2004-08-05 630-580-4XXX 4000–4999Assigned RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 8702 WHEATON IL
2004-08-05 630-639-4XXX 4000–4999Assigned RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 8702 W CHICAGO IL
2004-08-04 630-547-4XXX 4000–4999Assigned RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 8702 GLEN ELLYN IL
2002-09-12 630-523-1XXX 1000–1999Assigned RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 8702 ROSELLE IL
2000-12-27 630-544-6XXX 6000–6999Assigned RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 8702 NAPERVILLE IL

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.