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 501
CENTURYLINK COMMUNICATIONS, LLC 44
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
2016-05-27 501-294-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MORGANTON AR
2015-01-21 501-419-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ROSE BUD AR
2015-01-13 501-432-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J NIMROD AR
2014-12-19 501-486-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SPRINGLAKE AR
2014-12-19 501-542-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SYVNHLSHWD AR
2014-12-19 501-897-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WRIGHTSVL AR
2014-12-17 501-207-9XXX 9000–9999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SEARCY AR
2014-12-17 501-289-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MORRILTON AR
2014-12-17 501-306-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J QUITMAN AR
2014-12-17 501-485-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PINNACLE AR
2014-12-17 501-523-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SCOTT AR
2014-12-17 501-594-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PARON AR
2014-12-17 501-728-1XXX 1000–1999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PANGBURN AR
2014-12-17 501-796-9XXX 9000–9999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J VILONIA AR
2014-12-17 501-803-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PALARM AR
2014-12-12 501-238-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GREERSFRRY AR
2014-12-12 501-302-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HEBER SPG AR
2014-12-12 501-330-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WYE AR
2014-12-12 501-331-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PERRYVILLE AR
2014-12-12 501-440-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SO FOURCHE AR
2014-12-12 501-467-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MALVERN AR
2014-12-12 501-482-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J FERNDALE AR
2014-12-12 501-703-2XXX 2000–2999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LONOKE AR
2014-12-12 501-815-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J JONESMILLS AR
2014-12-12 501-849-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ENOLA AR
2014-12-12 501-881-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HOTSPRINGS AR
2014-12-12 501-915-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J JESSIEVL AR
2014-12-12 501-939-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LONSDALE AR
2014-12-11 501-239-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BEEBE AR
2014-12-11 501-314-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GREENBRIER AR
2014-12-11 501-481-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BRYANTCGVL AR
2014-12-11 501-504-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CONWAY AR
2014-12-11 501-507-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BENTON AR
2014-12-11 501-602-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BAUXITE AR
2014-12-11 501-669-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CLEVELAND AR
2014-12-11 501-759-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BIGELOW AR
2014-12-11 501-991-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CRYSTALSPG AR
2014-12-09 501-729-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J JUDSONIA AR
2014-11-25 501-333-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MAUMELLE AR
2014-11-06 501-299-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J KENSETT AR
2014-11-06 501-422-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CABOT AR
2014-11-06 501-983-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J JACKSONVL AR
2014-11-05 501-530-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BALD KNOB AR
2014-08-26 501-508-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LITTLEROCK AR

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.