NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

355 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 28
NEW CINGULAR WIRELESS PCS, LLC - DC 26
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
918-840 T-MOBILE USA, INC. 6529 MUSKOGEE OK
918-841 T-MOBILE USA, INC. 6529 BARTLESVL OK
918-843 VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 CHECOTAH OK
918-846 SHIDLER TEL. CO. 2023 WYNONA OK
918-847 VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 BARNSDALL OK
918-850 T-MOBILE USA, INC. 6529 TULSA OK
918-851 T-MOBILE USA, INC. 6529 TULSA OK
918-852 T-MOBILE USA, INC. 6529 TULSA OK
918-853 T-MOBILE USA, INC. 6529 TULSA OK
918-854 OZARK TELEPHONE COMPANY 1866 SOWESTCITY OK
918-855 UNITED STATES CELLULAR - OK 6272 TULSA OK
918-856 UNITED STATES CELLULAR - OK 6272 TULSA OK
918-857 UNITED STATES CELLULAR - OK 6272 TULSA OK
918-858 LEVEL 3 TELECOM OF OKLAHOMA, LLC - OK 7632 TULSA OK
918-862 SOUTHWESTERN BELL 9533 OILTON OK
918-865 CIMARRON TEL. CO. 1982 MANNFORD OK
918-866 CENTRAL OKLAHOMA TELEPHONE CO., L.L.C. 1977 SPARKS OK
918-867 WINDSTREAM OKLAHOMA, INC. 1965 ASHLAND OK
918-868 SALINA-SPAVINAW TEL. CO. 2022 KANSAS OK
918-874 WINDSTREAM OKLAHOMA, INC. 1965 WARDVILLE OK
918-875 SOUTHWESTERN BELL 9533 MOFFETT OK
918-877 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OK 7258 TULSA OK
918-878 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 TULSA OK
918-879 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OK 7258 TULSA OK
918-885 VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 HOMINY OK
918-888 CENTURYLINK COMMUNICATIONS, LLC 508J CATOOSA OK
918-893 COMCAST IP PHONE, LLC 318J BROKENARRW OK
918-897 BANDWIDTH.COM CLEC, LLC - OK 119F HOMINY OK
918-898 SOUTHWESTERN BELL 9533 XXXXXXXXXX OK
918-902 NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TULSA OK
918-911 MULTIPLE OCN LISTING MULT XXXXXXXXXX OK
918-922 NUSO, LLC 732J TULSA OK
918-923 COMCAST IP PHONE, LLC 318J CLAREMORE OK
918-925 SOUTHWESTERN BELL 9533 TULSA OK
918-928 BANDWIDTH.COM CLEC, LLC - OK 119F OWASSO OK
918-929 CRAW-KAN TEL. COOP.,INC. - KS 1818 SOUTH EDNA OK
918-932 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TULSA OK
918-938 BTC BROADBAND, INC. 669B TULSA OK
918-939 SOUTHWESTERN BELL 9533 TULSA OK
918-940 COMCAST IP PHONE, LLC 318J BROKENARRW OK
918-943 COMCAST IP PHONE, LLC 318J BIXBY OK
918-945 CROSS TEL. CO. 1985 MCCURTAIN OK
918-947 COMCAST IP PHONE, LLC 318J TULSA OK
918-949 COMCAST IP PHONE, LLC 318J TULSA OK
918-950 OK
918-951 NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TULSA OK
918-952 SOUTHWESTERN BELL 9533 XXXXXXXXXX OK
918-955 NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TULSA OK
918-957 COMCAST IP PHONE, LLC 318J BROKENARRW OK
918-958 OK

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.