NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

360 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 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 26
Rogers Communications Canada Inc. (Wireless) 23
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
— 314-204 not yet reported which blocks → SPOK, INC. 6630 ST LOUIS MO
— 314-205 not yet reported which blocks → SOUTHWESTERN BELL 9533 CREVECOEUR MO
— 314-206 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-209 9XXX which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-210 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
— 314-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MO
— 314-212 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-213 0XXX which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-214 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-215 1XXX6XXX7XXX8XXX9XXX which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-216 0XXX1XXX3XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-218 0XXX2XXX3XXX4XXX5XXX6XXX8XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-219 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-220 none assigned yet which blocks → T-MOBILE USA, INC. 6529 CREVECOEUR MO
— 314-222 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - MO 093F LADUE MO
— 314-223 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
— 314-226 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ST LOUIS MO
— 314-227 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MO 4932 LADUE MO
— 314-228 0–9 XXXwhole prefix which blocks → ONVOY, LLC - MO 093F CREVECOEUR MO
— 314-229 not yet reported which blocks → T-MOBILE USA, INC. 6529 ST LOUIS MO
— 314-230 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 ST LOUIS MO
— 314-231 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-232 not yet reported which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 LADUE MO
— 314-233 not yet reported which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 LADUE MO
— 314-234 not yet reported which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 LADUE MO
— 314-235 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-236 1XXX7XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 ST LOUIS MO
— 314-237 0–9 XXXwhole prefix which blocks → ONVOY, LLC - MO 093F LADUE MO
— 314-238 4XXX6XXX8XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J KIRKWOOD MO
— 314-239 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LADUE MO
— 314-241 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-242 none assigned yet which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-244 3XXX which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-245 not yet reported which blocks → SPOK, INC. 6630 ST LOUIS MO
— 314-246 0XXX1XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-247 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-248 0–9 XXXwhole prefix which blocks → ONVOY, LLC - MO 093F MEHLVILLE MO
— 314-249 2XXX which blocks → T-MOBILE USA, INC. 6529 LADUE MO
— 314-252 0XXX1XXX2XXX8XXX9XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 LADUE MO
— 314-253 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-255 3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → XO MISSOURI, INC. 4774 ST LOUIS MO
— 314-259 1XXX which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-260 1XXX4XXX6XXX7XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-261 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-263 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-264 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-265 none assigned yet which blocks → T-MOBILE USA, INC. 6529 LADUE MO
— 314-266 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MO 4932 LADUE MO
— 314-267 none assigned yet which blocks → T-MOBILE USA, INC. 6529 ST LOUIS MO
— 314-268 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO

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.