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
918-642 VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 FAIRFAX OK
918-643 SPOK, INC. 6630 TULSA OK
918-645 NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TULSA OK
918-646 SPOK, INC. 6630 TULSA OK
918-647 OKLAHOMA WINDSTREAM, INC. 2011 POTEAU OK
918-648 TOTAH COMMUNICATIONS, INC. 2030 BURBANK OK
918-649 OKLAHOMA WINDSTREAM, INC. 2011 POTEAU OK
918-650 SOUTHWESTERN BELL 9533 HENRYETTA OK
918-651 OKLAHOMA WESTERN TEL. CO. 2014 MUSE OK
918-652 SOUTHWESTERN BELL 9533 HENRYETTA OK
918-653 OKLAHOMA WINDSTREAM, INC. 2011 HEAVENER OK
918-654 OKLAHOMA WINDSTREAM, INC. 2011 CAMERON OK
918-655 OKLAHOMA WINDSTREAM, INC. 2011 WISTER OK
918-656 OKLATEL COMMUNICATIONS, INC. 2013 DUSTIN OK
918-657 OKLATEL COMMUNICATIONS, INC. 2013 HANNA OK
918-658 OKLAHOMA WINDSTREAM, INC. 2011 MONROEHOWE OK
918-659 OKLAHOMA WESTERN TEL. CO. 2014 FANSHAWE OK
918-660 SOUTHWESTERN BELL 9533 TULSA OK
918-661 SOUTHWESTERN BELL 9533 BARTLESVL OK
918-662 SOUTHWESTERN BELL 9533 BARTLESVL OK
918-663 SOUTHWESTERN BELL 9533 TULSA OK
918-664 SOUTHWESTERN BELL 9533 TULSA OK
918-665 SOUTHWESTERN BELL 9533 TULSA OK
918-666 SENECA TEL. CO. 1945 WESTSENECA OK
918-667 CENTRAL OKLAHOMA TELEPHONE CO., L.L.C. 1977 BOLEY OK
918-668 CENTRAL OKLAHOMA TELEPHONE CO., L.L.C. 1977 CASTLE OK
918-669 SOUTHWESTERN BELL 9533 TULSA OK
918-670 SOUTHWESTERN BELL 9533 TULSA OK
918-671 NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TULSA OK
918-672 SPOK, INC. 6630 TULSA OK
918-673 SOUTHWESTERN BELL 9533 PICHER OK
918-674 SOUTHWESTERN BELL 9533 QUAPAW OK
918-675 SOUTHWESTERN BELL 9533 COMMERCE OK
918-676 SOUTHWESTERN BELL 9533 FAIRLAND OK
918-677 OKLAHOMA WESTERN TEL. CO. 2014 SUMMERFLD OK
918-678 WYANDOTTE TEL. CO. 2034 WYANDOTTE OK
918-680 SOUTHWESTERN BELL 9533 MUSKOGEE OK
918-681 SOUTHWESTERN BELL 9533 MUSKOGEE OK
918-682 SOUTHWESTERN BELL 9533 MUSKOGEE OK
918-683 SOUTHWESTERN BELL 9533 MUSKOGEE OK
918-684 SOUTHWESTERN BELL 9533 MUSKOGEE OK
918-685 NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MUSKOGEE OK
918-686 SOUTHWESTERN BELL 9533 MUSKOGEE OK
918-687 SOUTHWESTERN BELL 9533 MUSKOGEE OK
918-688 NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TULSA OK
918-689 SOUTHWESTERN BELL 9533 EUFAULA OK
918-690 SOUTHWESTERN BELL 9533 TULSA OK
918-691 NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TULSA OK
918-692 SOUTHWESTERN BELL 9533 TULSA OK
918-693 UNITED STATES CELLULAR - OK 6272 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.