NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

4 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, last 30 days — NPA 641
ONVOY, LLC - IA 2
T-MOBILE USA, INC. 1
NEW CINGULAR WIRELESS PCS, LLC - IL 1
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
2019-09-13 641-441-2XXX 2000–2999Assigned GREENWAY COMMUNICATIONS L.L.C. - IA 860F KLEMME IA
2019-09-09 641-215-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 OSKALOOSA IA
2019-09-05 641-925-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 GARNER IA
2019-08-29 641-334-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F ROSE HILL IA
2019-08-29 641-461-9XXX 9000–9999Assigned HD CARRIER LLC 321J CHARLES CY IA
2019-08-28 641-529-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CLEAR LAKE IA
2019-08-23 641-200-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F CHARLES CY IA
2019-08-23 641-326-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F MONA IA
2019-08-23 641-326-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F MONA IA
2019-08-23 641-329-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F BAILEY IA
2019-08-23 641-329-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F BAILEY IA
2019-08-23 641-354-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F MARSHALLTN IA
2019-08-23 641-381-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F NORTHWOOD IA
2019-08-23 641-381-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F NORTHWOOD IA
2019-08-23 641-505-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F MANLY IA
2019-08-23 641-505-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F MANLY IA
2019-08-23 641-531-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F IOWA FALLS IA
2019-08-23 641-531-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F IOWA FALLS IA
2019-08-23 641-548-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F MASON CITY IA
2019-08-23 641-575-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F OTTUMWA IA
2019-08-23 641-575-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F OTTUMWA IA
2019-08-23 641-630-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F HAMPTON IA
2019-08-23 641-666-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F OSAGE IA
2019-08-23 641-670-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F OSKALOOSA IA
2019-08-23 641-860-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F BRITT IA
2019-08-23 641-999-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F NASHUA IA
2019-03-20 641-354-7XXX 7000–7999Assigned HEART OF IOWA VENTURES, L.L.C. - IA 346F MARSHALLTN IA
2019-03-12 641-840-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IA 8344 NEWTON IA
2019-02-12 641-362-1XXX 1000–1999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F CRESTON IA
2019-02-11 641-671-9XXX 9000–9999Assigned UNITED STATES CELLULAR - IA 6266 LENOX IA
2019-01-04 641-501-6XXX 6000–6999Assigned MAHASKA COMMUNICATION GROUP, LLC - IA 916A MONTEZUMA IA
2018-11-26 641-609-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ALEXANDER IA
2018-11-14 641-401-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SWALEDALE IA
2018-11-14 641-406-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MESERVEY IA
2018-11-14 641-614-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SHARPSBURG IA
2018-11-14 641-646-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ROWAN IA
2018-11-14 641-671-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LENOX IA
2018-11-14 641-681-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GOODELL IA
2018-11-07 641-609-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F ALEXANDER IA
2018-11-06 641-819-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FAIRFIELD IA
2018-10-26 641-401-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F SWALEDALE IA
2018-10-26 641-406-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F MESERVEY IA
2018-10-26 641-614-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F SHARPSBURG IA
2018-10-26 641-646-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F ROWAN IA
2018-10-26 641-671-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F LENOX IA
2018-10-26 641-681-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F GOODELL IA
2018-10-23 641-418-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F CORNING IA
2018-10-23 641-881-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F LATIMER IA
2018-10-23 641-892-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F SHEFFIELD IA
2018-10-17 641-247-3XXX 3000–3999Assigned AUREON COMMUNICATIONS, LLC 444G FONTANELLE IA

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.