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
— 314-955 not yet reported which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 ST LOUIS MO
— 314-956 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 LADUE MO
— 314-957 5XXX8XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 KIRKWOOD MO
— 314-958 not yet reported which blocks → MO
— 314-959 not yet reported which blocks → MO
— 314-960 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
— 314-961 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-962 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-963 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-964 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 LADUE MO
— 314-965 not yet reported which blocks → SOUTHWESTERN BELL 9533 KIRKWOOD MO
— 314-966 not yet reported which blocks → SOUTHWESTERN BELL 9533 KIRKWOOD MO
— 314-968 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-971 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
— 314-972 none assigned yet which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-973 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 LADUE MO
— 314-974 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KIRKWOOD MO
— 314-975 not yet reported which blocks → SOUTHWESTERN BELL 9533 XXXXXXXXXX MO
— 314-976 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MO
— 314-977 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-982 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-983 8XXX which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-984 not yet reported which blocks → SOUTHWESTERN BELL 9533 KIRKWOOD MO
— 314-985 4XXX7XXX8XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 CREVECOEUR MO
— 314-989 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-990 not yet reported which blocks → SPOK, INC. 6630 ST LOUIS MO
— 314-991 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-992 not yet reported which blocks → SOUTHWESTERN BELL 9533 ST LOUIS MO
— 314-993 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-994 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-995 0XXX which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-996 9XXX which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-997 not yet reported which blocks → SOUTHWESTERN BELL 9533 LADUE MO
— 314-999 not yet reported which blocks → SPOK, INC. 6630 ST LOUIS MO
— 315-202 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K WATERVILLE NY
— 315-203 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K ADAMS NY
— 315-204 0XXX1XXX3XXX4XXX5XXX6XXX · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K W WINFIELD NY
— 315-205 4XXX7XXX9XXX · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K REMSEN NY
— 315-206 4XXX7XXX9XXX · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K HOLLD PTNT NY
— 315-207 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → VERIZON NEW YORK, INC. 9104 OSWEGO NY
— 315-208 3XXX4XXX8XXX · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K WINTHROP NY
— 315-210 0XXX2XXX3XXX4XXX5XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J NEWARK NY
— 315-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 315-212 4XXX5XXX6XXX7XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 POTSDAM NY
— 315-213 not yet reported which blocks → SPOK, INC. 6630 AUBURN NY
— 315-214 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-215 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → TC SYSTEMS, INC. - NY 7140 ALEXNDRIBY NY
— 315-216 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 OSWEGO NY
— 315-217 1XXX5XXX6XXX7XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J SKANEATLES NY
— 315-218 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J SYRACUSE NY

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.