NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

1 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, last 30 days — NPA 405
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 1
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
— 405-736 not yet reported which blocks → SOUTHWESTERN BELL 9533 MIDWEST CY OK
— 405-737 not yet reported which blocks → SOUTHWESTERN BELL 9533 MIDWEST CY OK
— 405-738 0–9 XXXall 10 · 4 holders which blocks → EXIANT COMMUNICATIONS LLC 114J OKLA CITY OK
— 405-739 not yet reported which blocks → SOUTHWESTERN BELL 9533 MIDWEST CY OK
— 405-740 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OKLA CITY OK
— 405-741 9XXX which blocks → SOUTHWESTERN BELL 9533 MIDWEST CY OK
— 405-742 none assigned yet which blocks → SOUTHWESTERN BELL 9533 STILLWATER OK
— 405-743 not yet reported which blocks → SOUTHWESTERN BELL 9533 STILLWATER OK
— 405-744 not yet reported which blocks → SOUTHWESTERN BELL 9533 STILLWATER OK
— 405-745 0XXX which blocks → SOUTHWESTERN BELL 9533 WHEATLAND OK
— 405-747 2XXX3XXX which blocks → SOUTHWESTERN BELL 9533 STILLWATER OK
— 405-748 0XXX1XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 BRITTON OK
— 405-749 8XXX which blocks → SOUTHWESTERN BELL 9533 BRITTON OK
— 405-750 not yet reported which blocks → PAGE PLUS, INC. 9671 MOORE OK
— 405-751 not yet reported which blocks → SOUTHWESTERN BELL 9533 BRITTON OK
— 405-752 not yet reported which blocks → SOUTHWESTERN BELL 9533 BRITTON OK
— 405-753 0XXX1XXX2XXX3XXX4XXX5XXX6XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 BRITTON OK
— 405-755 not yet reported which blocks → SOUTHWESTERN BELL 9533 BRITTON OK
— 405-756 none assigned yet which blocks → VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 LINDSAY OK
— 405-759 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J MOORE OK
— 405-760 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OKLA CITY OK
— 405-764 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OK 409F OKLA CITY OK
— 405-767 0XXX4XXX8XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 BRITTON OK
— 405-769 not yet reported which blocks → SOUTHWESTERN BELL 9533 NICOMAPARK OK
— 405-770 not yet reported which blocks → SPOK, INC. 6630 OKLA CITY OK
— 405-771 0XXX6XXX7XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 SPENCER OK
— 405-773 0XXX which blocks → SOUTHWESTERN BELL 9533 BETHANY OK
— 405-775 0XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 BRITTON OK
— 405-777 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SHAWNEE OK
— 405-779 4XXX9XXX which blocks → SOUTHWESTERN BELL 9533 CHICKASHA OK
— 405-780 2XXX3XXX4XXX5XXX6XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 STILLWATER OK
— 405-781 not yet reported which blocks → PAGE PLUS, INC. 9671 MOORE OK
— 405-782 8XXX which blocks → SOUTHWESTERN BELL 9533 BETHANY OK
— 405-783 0XXX2XXX3XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 BYARS OK
— 405-784 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 ASHER OK
— 405-785 0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 ALEX OK
— 405-786 0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 WELEETKA OK
— 405-787 not yet reported which blocks → SOUTHWESTERN BELL 9533 BETHANY OK
— 405-789 not yet reported which blocks → SOUTHWESTERN BELL 9533 BETHANY OK
— 405-790 not yet reported which blocks → SOUTHWESTERN BELL 9533 MOORE OK
— 405-791 6XXX which blocks → SOUTHWESTERN BELL 9533 BETHANY OK
— 405-792 0XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 BETHANY OK
— 405-793 not yet reported which blocks → SOUTHWESTERN BELL 9533 MOORE OK
— 405-794 not yet reported which blocks → SOUTHWESTERN BELL 9533 MOORE OK
— 405-796 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J SPENCER OK
— 405-797 not yet reported which blocks → HINTON TEL. CO. OF HINTON OK, INC. 1995 EAKLY OK
— 405-798 not yet reported which blocks → SOUTHWESTERN BELL 9533 BETHANY OK
— 405-799 not yet reported which blocks → SOUTHWESTERN BELL 9533 MOORE OK
— 405-800 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 MOORE OK
— 405-801 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J NORMAN 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.