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 319
CENTURYLINK COMMUNICATIONS, LLC 67
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
2023-12-11 319-451-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CEDAR RPDS IA
2023-05-16 319-340-2XXX 2000–2999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WATERLOO IA
2023-03-06 319-451-2XXX 2000–2999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CEDAR RPDS IA
2020-07-10 319-206-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CEDAR RPDS IA
2017-10-02 319-884-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J APLINGTON IA
2017-08-16 319-264-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J OELWEIN IA
2017-05-24 319-596-2XXX 2000–2999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WAVERLY IA
2017-05-23 319-205-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MT VERNON IA
2017-05-23 319-281-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HUDSON IA
2017-05-16 319-448-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WALKER IA
2017-05-16 319-458-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WASHINGTON IA
2017-05-16 319-698-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J W CHESTER IA
2017-05-16 319-888-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WATERLOO IA
2017-05-15 319-224-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J TROY MILLS IA
2017-05-15 319-318-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J VINTON IA
2017-05-15 319-345-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J REINBECK IA
2017-05-15 319-478-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J TRAER IA
2017-05-15 319-543-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SOLON IA
2017-05-15 319-645-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J TIFFIN IA
2017-05-15 319-648-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J RIVERSIDE IA
2017-05-15 319-938-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ROWLEY IA
2017-05-11 319-408-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LISBON IA
2017-05-11 319-628-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J OXFORD IA
2017-05-11 319-629-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LONE TREE IA
2017-05-11 319-642-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MARENGO IA
2017-05-11 319-723-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J NICHOLS IA
2017-05-11 319-820-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MONTICELLO IA
2017-05-11 319-983-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PARKERSBG IA
2017-05-10 319-271-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J INDEPNDNCE IA
2017-05-10 319-631-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J IOWA CITY IA
2017-05-10 319-635-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J FAIRBANK IA
2017-05-10 319-636-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HAZLETON IA
2017-05-10 319-987-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J JANESVILLE IA
2017-05-09 319-220-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CENTRAL CY IA
2017-05-09 319-251-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ANAMOSA IA
2017-05-09 319-474-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BRANDON IA
2017-05-09 319-575-9XXX 9000–9999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CEDARFALLS IA
2017-05-09 319-662-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CONROY IA
2017-05-09 319-727-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J COGGON IA
2017-05-09 319-849-0XXX 0000–0999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CENTER PT IA
2017-05-09 319-984-3XXX 3000–3999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J DENVER IA
2017-02-24 319-249-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CEDAR RPDS IA
2016-09-13 319-838-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ARGYLE IA
2016-09-07 319-257-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WINFIELD IA
2016-09-07 319-837-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WEST POINT IA
2016-09-06 319-254-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J OLDS IA
2016-09-06 319-258-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SALEM IA
2016-09-06 319-456-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J RICHLAND IA
2016-09-06 319-463-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MONTROSE IA
2016-09-06 319-614-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PACKWOOD IA

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.