NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 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)

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
— 918-248 0XXX1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → SOUTHWESTERN BELL 9533 SAPULPA OK
— 918-249 not yet reported which blocks → VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 BROKENARRW OK
— 918-250 not yet reported which blocks → VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 BROKENARRW OK
— 918-251 not yet reported which blocks → VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 BROKENARRW OK
— 918-252 not yet reported which blocks → VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 BROKENARRW OK
— 918-253 none assigned yet which blocks → GRAND TEL. CO., INC. 1994 JAY OK
— 918-254 not yet reported which blocks → VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 BROKENARRW OK
— 918-255 0XXX1XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 SOCOFFEYVL OK
— 918-256 not yet reported which blocks → SOUTHWESTERN BELL 9533 VINITA OK
— 918-257 0XXX3XXX6XXX7XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 AFTON OK
— 918-258 not yet reported which blocks → VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 BROKENARRW OK
— 918-259 not yet reported which blocks → VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 BROKENARRW OK
— 918-260 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TULSA OK
— 918-261 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TULSA OK
— 918-262 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J WATTS OK
— 918-263 not yet reported which blocks → VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 AVANT OK
— 918-266 not yet reported which blocks → SOUTHWESTERN BELL 9533 CATOOSA OK
— 918-267 not yet reported which blocks → BEGGS TEL. CO., INC. 1968 BEGGS OK
— 918-268 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → UNITED STATES CELLULAR - OK 6272 HENRYETTA OK
— 918-269 2XXX which blocks → T-MOBILE USA, INC. 6529 TULSA OK
— 918-270 0XXX3XXX which blocks → SOUTHWESTERN BELL 9533 TULSA OK
— 918-271 5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 TULSA OK
— 918-272 not yet reported which blocks → SOUTHWESTERN BELL 9533 OWASSO OK
— 918-273 6XXX which blocks → SOUTHWESTERN BELL 9533 NOWATA OK
— 918-274 not yet reported which blocks → SOUTHWESTERN BELL 9533 OWASSO OK
— 918-275 not yet reported which blocks → TOTAH COMMUNICATIONS, INC. 2030 TALALA OK
— 918-276 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → UNITED STATES CELLULAR - OK 6272 VINITA OK
— 918-278 not yet reported which blocks → PAGING TULSA, INC. 6840 TULSA OK
— 918-279 2XXX4XXX6XXX7XXX · 3 holders which blocks → VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 COWETA OK
— 918-280 0XXX1XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 TULSA OK
— 918-281 5XXX6XXX8XXX9XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA OK - LLC 530C TULSA OK
— 918-283 0XXX3XXX4XXX5XXX6XXX7XXX9XXX · 7 holders which blocks → SOUTHWESTERN BELL 9533 CLAREMORE OK
— 918-284 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TULSA OK
— 918-285 2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 CUSHING OK
— 918-286 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J BROKENARRW OK
— 918-287 6XXX8XXX which blocks → SOUTHWESTERN BELL 9533 PAWHUSKA OK
— 918-288 0XXX2XXX3XXX5XXX8XXX9XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 SPERRY OK
— 918-289 0XXX2XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 TULSA OK
— 918-291 0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 JENKS OK
— 918-292 8XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 TULSA OK
— 918-293 8XXX which blocks → SOUTHWESTERN BELL 9533 TULSA OK
— 918-294 not yet reported which blocks → VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 BROKENARRW OK
— 918-295 not yet reported which blocks → SOUTHWESTERN BELL 9533 TULSA OK
— 918-296 4XXX6XXX7XXX8XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 JENKS OK
— 918-297 0XXX4XXX6XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 HARTSHORNE OK
— 918-298 9XXX which blocks → SOUTHWESTERN BELL 9533 JENKS OK
— 918-299 not yet reported which blocks → SOUTHWESTERN BELL 9533 JENKS OK
— 918-300 0XXX1XXX2XXX3XXX4XXX7XXX8XXX · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J TALIHINA OK
— 918-301 2XXX5XXX7XXX8XXX9XXX which blocks → ONVOY, LLC - OK 409F TULSA OK
— 918-302 1XXX2XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 MCALESTER 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.