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
— 314-269 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J ST LOUIS MO
— 314-270 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 SAPPINGTON MO
— 314-271 0–9 XXXwhole prefix which blocks → ONVOY, LLC - MO 093F LADUE MO
— 314-272 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 SAPPINGTON MO
— 314-275 0XXX which blocks → SOUTHWESTERN BELL 9533 CREVECOEUR MO
— 314-276 none assigned yet which blocks → T-MOBILE USA, INC. 6529 LADUE MO
— 314-277 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
— 314-279 0–9 XXXall 10 · 5 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K LADUE MO
— 314-280 none assigned yet which blocks → T-MOBILE USA, INC. 6529 ST LOUIS MO
— 314-282 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MO 993E ST LOUIS MO
— 314-283 none assigned yet which blocks → T-MOBILE USA, INC. 6529 LADUE MO
— 314-284 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-286 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-288 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 KIRKWOOD MO
— 314-289 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-290 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-291 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-292 1XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → AT&T - LOCAL 7421 LADUE MO
— 314-293 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 OAKVILLE MO
— 314-294 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 LADUE MO
— 314-298 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-301 8XXX9XXX which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-302 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 LADUE MO
— 314-303 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 LADUE MO
— 314-304 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 LADUE MO
— 314-306 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 LADUE MO
— 314-307 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 LADUE MO
— 314-308 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LADUE MO
— 314-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MO
— 314-313 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 LADUE MO
— 314-315 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - MO 093F KIRKWOOD MO
— 314-316 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-317 0XXX which blocks → SOUTHWESTERN BELL 9533 CREVECOEUR MO
— 314-318 not yet reported which blocks → SPOK, INC. 6630 ST LOUIS MO
— 314-320 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ST LOUIS MO
— 314-321 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-322 none assigned yet which blocks → T-MOBILE USA, INC. 6529 LADUE MO
— 314-323 none assigned yet which blocks → T-MOBILE USA, INC. 6529 LADUE MO
— 314-324 none assigned yet which blocks → T-MOBILE USA, INC. 6529 LADUE MO
— 314-329 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - MO 093F MEHLVILLE MO
— 314-330 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 LADUE MO
— 314-331 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-333 1XXX2XXX9XXX which blocks → ONVOY, LLC - MO 093F ST LOUIS MO
— 314-334 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 OAKVILLE MO
— 314-335 0XXX7XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-336 not yet reported which blocks → PAETEC ITEL, LLC 829J CREVECOEUR MO
— 314-340 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-341 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 LADUE MO
— 314-342 9XXX which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-344 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE 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.