NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

10 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 217
ONVOY, LLC 3
NEW CINGULAR WIRELESS PCS, LLC - IL 3
EXIANT COMMUNICATIONS LLC 3
OPENTACT INC. 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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2010-07-01 217-933-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F HUMBOLDT IL
2010-07-01 217-994-9XXX 9000–9999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F EFFINGHAM IL
2010-06-30 217-551-2XXX 2000–2999Assigned MCC TELEPHONY LLC 593K HAMILTON IL
2010-06-30 217-609-0XXX 0000–0999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F CASEY IL
2010-06-30 217-849-0XXX 0000–0999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F TOLEDO IL
2010-06-30 217-895-0XXX 0000–0999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F NEOGA IL
2010-06-30 217-923-6XXX 6000–6999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F GREENUP IL
2010-06-30 217-948-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F KANSAS IL
2010-06-30 217-966-1XXX 1000–1999Assigned MCC TELEPHONY LLC 593K LOMAX IL
2010-06-30 217-967-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F WESTFIELD IL
2010-06-30 217-980-1XXX 1000–1999Assigned MCC TELEPHONY LLC 593K NAUVOO IL
2010-06-30 217-989-1XXX 1000–1999Assigned MCC TELEPHONY LLC 593K DALLASCITY IL
2010-06-25 217-295-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F MATTOON IL
2010-06-25 217-402-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHAMPAURBN IL
2010-06-18 217-220-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SPRINGFLD IL
2010-06-10 217-419-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHAMPAURBN IL
2010-06-10 217-491-8XXX 8000–8999Assigned UNITED STATES CELLULAR - IL 6265 JACKSONVL IL
2010-06-10 217-955-1XXX 1000–1999Assigned MCC TELEPHONY LLC 593K GREENVIEW IL
2010-06-04 217-460-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MATTOON IL
2010-06-04 217-517-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 JACKSONVL IL
2010-06-01 217-219-4XXX 4000–4999Assigned MCC TELEPHONY LLC 593K CARTHAGE IL
2010-05-27 217-918-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DANVILLE IL
2010-05-21 217-303-7XXX 7000–7999Assigned MCC TELEPHONY LLC 593K SPRINGFLD IL
2010-05-21 217-364-1XXX 1000–1999Assigned MCC TELEPHONY LLC 593K BUFFALO IL
2010-05-21 217-471-0XXX 0000–0999Assigned MCC TELEPHONY LLC 593K ROCHESTER IL
2010-05-21 217-472-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F CHAPIN IL
2010-05-21 217-487-3XXX 3000–3999Assigned MCC TELEPHONY LLC 593K CANTRALL IL
2010-05-21 217-488-1XXX 1000–1999Assigned MCC TELEPHONY LLC 593K NEW BERLIN IL
2010-05-21 217-624-0XXX 0000–0999Assigned MCC TELEPHONY LLC 593K LOAMI IL
2010-05-21 217-673-2XXX 2000–2999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F WOODSON IL
2010-05-21 217-685-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 SPRINGFLD IL
2010-05-21 217-685-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 SPRINGFLD IL
2010-05-20 217-329-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DECATUR IL
2010-05-20 217-994-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 EFFINGHAM IL
2010-05-07 217-866-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHAMPAURBN IL
2010-04-23 217-329-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DECATUR IL
2010-04-23 217-480-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHAMPAURBN IL
2010-04-23 217-480-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHAMPAURBN IL
2010-04-23 217-480-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHAMPAURBN IL
2010-04-23 217-505-1XXX 1000–1999Assigned MCC TELEPHONY LLC 593K WARSAW IL
2010-03-25 217-271-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F JACKSONVL IL
2010-03-24 217-293-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F MARSHALL IL
2010-03-24 217-303-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 SPRINGFLD IL
2010-03-22 217-592-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 QUINCY IL
2010-02-22 217-685-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRINGFLD IL
2010-02-04 217-514-9XXX 9000–9999Assigned MCC TELEPHONY LLC 593K MT AUBURN IL
2010-01-28 217-264-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 PARIS IL
2010-01-28 217-329-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DECATUR IL
2010-01-28 217-685-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 SPRINGFLD IL
2010-01-28 217-685-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 SPRINGFLD IL

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.