NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

371 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Which carriers received which NPA-NXX prefixes, and where. Assignments are initial assignments from NANPA records — because of number portability, the current serving carrier of individual numbers may differ. For finer-grained activity, see the thousands-block view above.

Most active assignees, last 30 days
8X8, INC. 38
ONVOY, LLC - CA 31
NEW CINGULAR WIRELESS PCS, LLC - IL 31
NEW CINGULAR WIRELESS PCS, LLC - DC 30
ONVOY, LLC - NJ 18
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 NPA-NXX prefix assignments
AssignedNPA-NXXAssigneeOCNRate centerState
217-923 FRONTIER COMMUNICATIONS OF THE CAROLINAS, INC - IL 1000 GREENUP IL
217-924 MONTROSE MUTUAL TEL. CO. 1058 MONTROSE IL
217-925 MONTROSE MUTUAL TEL. CO. 1058 DIETERICH IL
217-927 FRONTIER NORTH, INC. - IL 1015 PATTERSON IL
217-930 LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CARLINVL IL
217-932 FRONTIER COMMUNICATIONS OF THE CAROLINAS, INC - IL 1000 CASEY IL
217-934 FRONTIER NORTH, INC. - IL 1015 CLINTON IL
217-935 FRONTIER NORTH, INC. - IL 1015 CLINTON IL
217-936 ADAMS TEL. COOP. 0976 MENDON IL
217-937 FRONTIER NORTH, INC. - IL 1015 CLINTON IL
217-938 ADAMS TEL. COOP. 0976 LORAINE IL
217-941 ONVOY SPECTRUM, LLC 624H KENNEY IL
217-942 FRONTIER NORTH, INC. - IL 1015 CARROLLTON IL
217-944 FRONTIER NORTH, INC. - IL 1015 KENNEY IL
217-945 FRONTIER NORTH, INC. - IL 1015 HILLVIEW IL
217-946 GRANDVIEW MUTUAL TEL. CO. 1021 GRANDVIEW IL
217-947 FRONTIER NORTH, INC. - IL 1015 ELKHART IL
217-948 FRONTIER COMMUNICATIONS OF THE CAROLINAS, INC - IL 1000 KANSAS IL
217-949 FRONTIER NORTH, INC. - IL 1015 WAYNESVL IL
217-950 IL
217-952 TELNYX LLC 073H ATHENS IL
217-953 ONVOY, LLC 224C SPRINGFLD IL
217-955 MCC TELEPHONY LLC 593K GREENVIEW IL
217-956 AMERICAN MESSAGING SERVICES, LLC 9748 MATTOON IL
217-957 AMERICAN MESSAGING SERVICES, LLC 9748 MATTOON IL
217-958 MULTIPLE OCN LISTING MULT XXXXXXXXXX IL
217-959 MULTIPLE OCN LISTING MULT IL
217-962 T-MOBILE USA, INC. 6529 MATTOON IL
217-963 ILLINOIS BELL TEL CO 9329 HARRISTOWN IL
217-964 ADAMS TEL. COOP. 0976 URSA IL
217-965 FRONTIER NORTH, INC. - IL 1015 VIRDEN IL
217-967 FRONTIER COMMUNICATIONS OF THE CAROLINAS, INC - IL 1000 WESTFIELD IL
217-968 CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL 1183 GREENVIEW IL
217-970 COMCAST IP PHONE, LLC 318J SPRINGFLD IL
217-971 NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRINGFLD IL
217-972 NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DECATUR IL
217-975 NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MATTOON IL
217-976 IL
217-979 NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHAMPAURBN IL
217-980 MCC TELEPHONY LLC 593K NAUVOO IL
217-983 FRONTIER NORTH, INC. - IL 1015 ELDRED IL
217-985 ADAMS TEL. COOP. 0976 LIMA IL
217-987 FRONTIER COMMUNICATIONS OF THE CAROLINAS, INC - IL 1000 POTOMAC IL
217-991 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHAMPAURBN IL
217-993 EXIANT COMMUNICATIONS LLC 114J SPRINGFLD IL
217-994 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 EFFINGHAM IL
217-997 FRONTIER COMMUNICATIONS-MIDLAND, INC. 1055 ARENZVILLE IL
217-999 CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL 1183 MOUNTOLIVE IL
218-201 NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WARREN MN
218-202 NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BAUDETTE MN

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.