NumberResearch Membership · Data 09/22/2026

Recent prefix assignments

354 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026

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. 39
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 20
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
— 272-444 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - PA 547E SELINSGRV PA
— 272-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX PA
— 272-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT PA
— 272-570 not yet reported which blocks → PA
— 272-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX PA
— 272-666 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - PA 547E TAMAQUA PA
— 272-700 not yet reported which blocks → PA
— 272-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX PA
— 272-777 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - PA 547E GALILEE PA
— 272-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX PA
— 272-888 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - PA 547E HAMLIN PA
— 272-890 not yet reported which blocks → PA
— 272-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX PA
— 272-936 not yet reported which blocks → PA
— 272-950 not yet reported which blocks → PA
— 272-958 not yet reported which blocks → PA
— 272-959 not yet reported which blocks → PA
— 272-976 not yet reported which blocks → PA
— 272-999 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - PA 547E BEACH LAKE PA
— 274-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WI
— 274-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WI
— 274-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WI
— 274-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WI
— 274-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST WI
— 274-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WI
— 274-700 not yet reported which blocks → WI
— 274-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WI
— 274-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WI
— 274-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WI
— 274-950 not yet reported which blocks → WI
— 274-958 not yet reported which blocks → WI
— 274-959 not yet reported which blocks → WI
— 274-976 not yet reported which blocks → WI
— 276-201 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J MARTINSVL VA
— 276-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX VA
— 276-218 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → EAST KENTUCKY NETWRK, LLC DBA APPALACHIAN WIRELESS 6940 HAYSI VA
— 276-219 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NORTON VA
— 276-223 none assigned yet which blocks → UNITED TELEPHONE-SOUTHEAST-VA DBA CENTURYLINK-VA 4511 WYTHEVILLE VA
— 276-225 3XXX5XXX6XXX · 2 holders which blocks → UNITED TELEPHONE-SOUTHEAST-VA DBA CENTURYLINK-VA 4511 MORRISONCY VA
— 276-228 not yet reported which blocks → UNITED TELEPHONE-SOUTHEAST-VA DBA CENTURYLINK-VA 4511 WYTHEVILLE VA
— 276-233 none assigned yet which blocks → UNITED STATES CELLULAR - VA 6283 GALAX VA
— 276-235 6XXX7XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 GALAX VA
— 276-236 not yet reported which blocks → UNITED TELEPHONE-SOUTHEAST-VA DBA CENTURYLINK-VA 4511 GALAX VA
— 276-237 0XXX1XXX2XXX3XXX4XXX5XXX6XXX which blocks → UNITED STATES CELLULAR - VA 6283 GALAX VA
— 276-238 none assigned yet which blocks → UNITED TELEPHONE-SOUTHEAST-VA DBA CENTURYLINK-VA 4511 GALAX VA
— 276-239 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 WYTHEVILLE VA
— 276-243 0XXX1XXX2XXX4XXX6XXX7XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MARION VA
— 276-244 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → EAST KENTUCKY NETWRK, LLC DBA APPALACHIAN WIRELESS 6940 GRUNDY VA
— 276-247 0XXX1XXX2XXX3XXX8XXX9XXX · 3 holders which blocks → TELNYX LLC 073H MARION VA
— 276-251 4XXX6XXX · 2 holders which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 ARARAT VA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.