NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

355 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, last 30 days
8X8, INC. 38
ONVOY, LLC - CA 31
NEW CINGULAR WIRELESS PCS, LLC - IL 28
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
2023-08-07 680-279 0XXX1XXX2XXX3XXX4XXX5XXX · 2 holders which blocks → COMMIO, LLC 939H CAMDEN NY
2023-08-07 680-281 0XXX1XXX2XXX3XXX4XXX8XXX · 2 holders which blocks → COMMIO, LLC 939H FABIUS NY
2023-08-07 680-282 0–9 XXXall 10 · 2 holders which blocks → COMMIO, LLC 939H ILION NY
2023-08-07 680-283 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SYRACUSE NY
2023-08-07 680-284 0–9 XXXall 10 · 2 holders which blocks → COMMIO, LLC 939H LYONS NY
2023-08-07 689-314 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 732J ST CLOUD FL
2023-08-07 838-274 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 JOHNSTOWN NY
2023-08-07 838-275 0XXX1XXX2XXX3XXX4XXX which blocks → COMMIO, LLC 939H FORT ANN NY
2023-08-07 838-276 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 3 holders which blocks → COMMIO, LLC 939H GALWAY NY
2023-08-07 914-578 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSCHSTZN08 NY
2023-08-05 540-540 0XXX2XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H GLASGOW VA
2023-08-05 540-804 0XXX1XXX4XXX7XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H SHAWSVILLE VA
2023-08-05 804-880 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H LADYSMITH VA
2023-08-05 826-820 0XXX which blocks → ONVOY SPECTRUM, LLC 624H CRIGLERSVL VA
2023-08-05 826-860 0XXX which blocks → ONVOY SPECTRUM, LLC 624H SPERRYVL VA
2023-08-05 948-948 0XXX1XXX2XXX8XXX9XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H DENDRON VA
2023-08-04 227-200 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSHNGTNZN2 MD
2023-08-04 227-201 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MYERSVILLE MD
2023-08-04 227-202 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN10 MD
2023-08-04 308-291 3XXX which blocks → ONVOY, LLC - NE 549E GERING NE
2023-08-04 313-431 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN4 MI
2023-08-04 330-200 2XXX8XXX9XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 SHARON OH
2023-08-04 330-300 0–9 XXXall 10 · 3 holders which blocks → COMMIO, LLC 939H ORRVILLE OH
2023-08-04 341-235 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK GRNLF CA
2023-08-04 341-236 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK OLIVR CA
2023-08-04 369-201 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ROSA CA
2023-08-04 369-202 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ROSA CA
2023-08-04 419-955 0–9 XXXall 10 · 3 holders which blocks → COMMIO, LLC 939H BUCYRUS OH
2023-08-04 440-470 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 ASHTABULA OH
2023-08-04 480-956 0–9 XXXwhole prefix which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2023-08-04 531-334 0XXX3XXX · 2 holders which blocks → ONVOY, LLC - NE 549E OHIOWA NE
2023-08-04 531-336 0XXX3XXX · 2 holders which blocks → ONVOY, LLC - NE 549E BENNET NE
2023-08-04 531-337 3XXX7XXX · 2 holders which blocks → ONVOY, LLC - NE 549E PLATTE CTR NE
2023-08-04 531-339 0XXX3XXX · 2 holders which blocks → ONVOY, LLC - NE 549E AVOCA NE
2023-08-04 559-502 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 VISALIA CA
2023-08-04 567-330 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ASHLAND OH
2023-08-04 628-291 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → VOIP INNOVATIONS, LLC 597F MILLVALLEY CA
2023-08-04 769-205 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 VICKSBURG MS
2023-08-04 839-247 0XXX1XXX3XXX6XXX7XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 6398 JOHNSTON SC
2023-08-04 864-851 0XXX1XXX3XXX5XXX7XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 6398 CENTRAL SC
2023-08-04 878-234 0XXX2XXX3XXX7XXX8XXX9XXX · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 PTGSBNZN23 PA
2023-08-04 937-946 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 XENIA OH
2023-08-04 971-243 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J NEWBERG OR
2023-08-03 248-984 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FARMINGTON MI
2023-08-03 269-406 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BATTLE CRK MI
2023-08-03 302-410 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 REHOBOTH DE
2023-08-03 316-231 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WICHITA KS
2023-08-03 332-278 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC- NY 384C NWYRCYZN01 NY
2023-08-03 506-579 not yet reported which blocks → Bragg Communications Inc. 4878 Tracadie —
2023-08-03 506-584 not yet reported which blocks → Bragg Communications Inc. 4878 Campbellton —

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.