NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, all time — NPA 918
SOUTHWESTERN BELL 236
NEW CINGULAR WIRELESS PCS, LLC - IL 93
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 50
T-MOBILE USA, INC. 49
VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 36
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-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 918-730 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 TULSA OK
— 918-732 9XXX which blocks → SOUTHWESTERN BELL 9533 TULSA OK
— 918-733 not yet reported which blocks → VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 MORRIS OK
— 918-738 3XXX5XXX7XXX8XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 RALSTON OK
— 918-739 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → PAETEC ITEL, LLC 829J CATOOSA OK
— 918-740 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TULSA OK
— 918-741 not yet reported which blocks → PAGE PLUS, INC. 9671 TULSA OK
— 918-742 9XXX which blocks → SOUTHWESTERN BELL 9533 TULSA OK
— 918-743 not yet reported which blocks → SOUTHWESTERN BELL 9533 TULSA OK
— 918-744 9XXX which blocks → SOUTHWESTERN BELL 9533 TULSA OK
— 918-745 not yet reported which blocks → SOUTHWESTERN BELL 9533 TULSA OK
— 918-746 not yet reported which blocks → SOUTHWESTERN BELL 9533 TULSA OK
— 918-747 not yet reported which blocks → SOUTHWESTERN BELL 9533 TULSA OK
— 918-748 0XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 TULSA OK
— 918-749 not yet reported which blocks → SOUTHWESTERN BELL 9533 TULSA OK
— 918-750 not yet reported which blocks → PAGE PLUS, INC. 9671 TULSA OK
— 918-751 not yet reported which blocks → PAGE PLUS, INC. 9671 TULSA OK
— 918-752 1XXX6XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 OKMULGEE OK
— 918-753 not yet reported which blocks → OKLAHOMA WESTERN TEL. CO. 2014 LEFLORE OK
— 918-754 not yet reported which blocks → OKLAHOMA WESTERN TEL. CO. 2014 RED OAK OK
— 918-755 not yet reported which blocks → OKLAHOMA WESTERN TEL. CO. 2014 NASHOBA OK
— 918-756 not yet reported which blocks → SOUTHWESTERN BELL 9533 OKMULGEE OK
— 918-757 none assigned yet which blocks → CIMARRON TEL. CO. 1982 JENNINGS OK
— 918-758 5XXX which blocks → SOUTHWESTERN BELL 9533 OKMULGEE OK
— 918-759 3XXX7XXX which blocks → SOUTHWESTERN BELL 9533 OKMULGEE OK
— 918-760 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TULSA OK
— 918-761 not yet reported which blocks → SPOK, INC. 6630 TULSA OK
— 918-762 0XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → SOUTHWESTERN BELL 9533 PAWNEE OK
— 918-763 not yet reported which blocks → SPOK, INC. 6630 TULSA OK
— 918-764 0XXX5XXX6XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 TULSA OK
— 918-765 not yet reported which blocks → SHIDLER TEL. CO. 2023 WEBB CITY OK
— 918-766 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 BARTLESVL OK
— 918-767 not yet reported which blocks → CIMARRON TEL. CO. 1982 SKEDEE OK
— 918-768 not yet reported which blocks → CROSS TEL. CO. 1985 KINTA OK
— 918-772 0XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 TAHLEQUAH OK
— 918-773 none assigned yet which blocks → OKLAHOMA WINDSTREAM, INC. 2011 VIAN OK
— 918-774 none assigned yet which blocks → SOUTHWESTERN BELL 9533 SALLISAW OK
— 918-775 not yet reported which blocks → SOUTHWESTERN BELL 9533 SALLISAW OK
— 918-776 not yet reported which blocks → SOUTHWESTERN BELL 9533 SALLISAW OK
— 918-777 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 OKMULGEE OK
— 918-778 not yet reported which blocks → OKLAHOMA WINDSTREAM, INC. 2011 BARON OK
— 918-779 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 TULSA OK
— 918-781 2XXX3XXX9XXX which blocks → SOUTHWESTERN BELL 9533 MUSKOGEE OK
— 918-782 0XXX5XXX6XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 KETCHUM OK
— 918-783 not yet reported which blocks → ATLAS TEL. CO. 1966 BIG CABIN OK
— 918-784 not yet reported which blocks → ATLAS TEL. CO. 1966 BLUEJACKET OK
— 918-785 not yet reported which blocks → OKLAHOMA COMMUNICATION SYSTEM, INC. 1984 ADAIR OK
— 918-786 0XXX which blocks → SOUTHWESTERN BELL 9533 GROVE OK
— 918-787 not yet reported which blocks → SOUTHWESTERN BELL 9533 GROVE OK
— 918-788 not yet reported which blocks → ATLAS TEL. CO. 1966 WELCH OK

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.