NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 21
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
— 316-969 not yet reported which blocks → SPOK, INC. 6630 WICHITA KS
— 316-970 not yet reported which blocks → SOUTHWESTERN BELL 9533 XXXXXXXXXX KS
— 316-973 not yet reported which blocks → COMCAST IP PHONE, LLC 318J WICHITA KS
— 316-974 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - KS 205F CHENEY KS
— 316-975 0XXX1XXX3XXX5XXX6XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J WHITEWATER KS
— 316-976 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX KS
— 316-977 0–9 XXXwhole prefix which blocks → COMCAST IP PHONE, LLC 318J WICHITA KS
— 316-978 0XXX1XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 WICHITA KS
— 316-988 not yet reported which blocks → KS
— 316-990 not yet reported which blocks → T-MOBILE USA, INC. 6529 WICHITA KS
— 316-992 not yet reported which blocks → T-MOBILE USA, INC. 6529 WICHITA KS
— 316-993 not yet reported which blocks → T-MOBILE USA, INC. 6529 WICHITA KS
— 316-996 not yet reported which blocks → KS
— 317-200 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 INDIANAPLS IN
— 317-201 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 INDIANAPLS IN
— 317-202 1XXX5XXX · 2 holders which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-203 5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J PLAINFIELD IN
— 317-204 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IN 7314 PLAINFIELD IN
— 317-205 1XXX4XXX5XXX6XXX7XXX which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-207 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 CHARLOTSVL IN
— 317-208 0XXX which blocks → INDIANA BELL TEL CO INC 9325 CARMEL IN
— 317-209 4XXX5XXX6XXX7XXX · 2 holders which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IN
— 317-213 2XXX which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 INDIANAPLS IN
— 317-214 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → PAETEC ITEL, LLC 829J NOBLESVL IN
— 317-215 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → PAETEC ITEL, LLC 829J GREENWOOD IN
— 317-216 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-217 0XXX1XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-218 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J CARMEL IN
— 317-219 5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J NOBLESVL IN
— 317-221 9XXX which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-222 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-223 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → LEVEL 3 TELECOM OF INDIANA, LP - IN 7060 INDIANAPLS IN
— 317-225 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 INDIANAPLS IN
— 317-226 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-227 9XXX which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-228 7XXX which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-229 5XXX6XXX · 2 holders which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-230 not yet reported which blocks → LEVEL 3 TELECOM OF INDIANA, LP - IN 7060 INDIANAPLS IN
— 317-231 5XXX which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-232 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-233 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-234 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-235 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 INDIANAPLS IN
— 317-236 8XXX9XXX which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-237 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-238 0XXX3XXX8XXX9XXX · 2 holders which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-239 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-240 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-241 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.