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
918-767 CIMARRON TEL. CO. 1982 SKEDEE OK
918-768 CROSS TEL. CO. 1985 KINTA OK
918-772 SOUTHWESTERN BELL 9533 TAHLEQUAH OK
918-773 OKLAHOMA WINDSTREAM, INC. 2011 VIAN OK
918-774 SOUTHWESTERN BELL 9533 SALLISAW OK
918-775 SOUTHWESTERN BELL 9533 SALLISAW OK
918-776 SOUTHWESTERN BELL 9533 SALLISAW OK
918-777 T-MOBILE USA, INC. 6529 OKMULGEE OK
918-778 OKLAHOMA WINDSTREAM, INC. 2011 BARON OK
918-779 LEVEL 3 COMMUNICATIONS, LLC - OK 5257 TULSA OK
918-781 SOUTHWESTERN BELL 9533 MUSKOGEE OK
918-782 SOUTHWESTERN BELL 9533 KETCHUM OK
918-783 ATLAS TEL. CO. 1966 BIG CABIN OK
918-784 ATLAS TEL. CO. 1966 BLUEJACKET OK
918-785 OKLAHOMA COMMUNICATION SYSTEM, INC. 1984 ADAIR OK
918-786 SOUTHWESTERN BELL 9533 GROVE OK
918-787 SOUTHWESTERN BELL 9533 GROVE OK
918-788 ATLAS TEL. CO. 1966 WELCH OK
918-789 SOUTHWESTERN BELL 9533 CHELSEA OK
918-791 SOUTHWESTERN BELL 9533 GROVE OK
918-793 SHIDLER TEL. CO. 2023 SHIDLER OK
918-794 COMCAST IP PHONE, LLC 318J TULSA OK
918-796 ONVOY, LLC - OK 409F TULSA OK
918-797 OKLAHOMA WINDSTREAM, INC. 2011 STILWELL OK
918-798 UNITED STATES CELLULAR - OK 6272 TULSA OK
918-799 CROSS TEL. CO. 1985 ENTERPRISE OK
918-801 NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GROVE OK
918-808 T-MOBILE USA, INC. 6529 TULSA OK
918-809 T-MOBILE USA, INC. 6529 TULSA OK
918-810 T-MOBILE USA, INC. 6529 TULSA OK
918-811 MULTIPLE OCN LISTING MULT XXXXXXXXXX OK
918-812 T-MOBILE USA, INC. 6529 TULSA OK
918-813 T-MOBILE USA, INC. 6529 TULSA OK
918-814 T-MOBILE USA, INC. 6529 TULSA OK
918-815 T-MOBILE USA, INC. 6529 BARTLESVL OK
918-816 T-MOBILE USA, INC. 6529 MUSKOGEE OK
918-823 OKLATEL COMMUNICATIONS, INC. 2013 INDIANOLA OK
918-824 SOUTHWESTERN BELL 9533 PRYOR OK
918-825 SOUTHWESTERN BELL 9533 PRYOR OK
918-826 OKLATEL COMMUNICATIONS, INC. 2013 SCIPIO OK
918-827 OKLAHOMA COMMUNICATION SYSTEM, INC. 1984 MOUNDS OK
918-828 SOUTHWESTERN BELL 9533 TULSA OK
918-830 T-MOBILE USA, INC. 6529 TULSA OK
918-831 SOUTHWESTERN BELL 9533 TULSA OK
918-832 SOUTHWESTERN BELL 9533 TULSA OK
918-833 SOUTHWESTERN BELL 9533 TULSA OK
918-834 SOUTHWESTERN BELL 9533 TULSA OK
918-835 SOUTHWESTERN BELL 9533 TULSA OK
918-836 SOUTHWESTERN BELL 9533 TULSA OK
918-838 SOUTHWESTERN BELL 9533 TULSA 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.