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
2021-07-29 223-269 0–9 XXXall 10 · 5 holders which blocks → D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 CARLISLE PA
2021-07-29 223-623 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - PA 547E QUARRYVL PA
2021-07-29 236-758 not yet reported which blocks → TELUS 8086 Victoria —
2021-07-29 313-650 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DETROITZN6 MI
2021-07-29 332-345 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H NWYRCYZN01 NY
2021-07-29 341-203 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RICHMOND CA
2021-07-29 385-409 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2021-07-29 385-410 0–9 XXXall 10 · 6 holders which blocks → TELNYX LLC 073H MORGAN UT
2021-07-29 385-413 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2021-07-29 442-360 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PALM SPG CA
2021-07-29 442-361 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PALM SPG CA
2021-07-29 447-213 0XXX2XXX3XXX4XXX5XXX which blocks → ONVOY, LLC 224C SHELBYVL IL
2021-07-29 470-840 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E CONYERS GA
2021-07-29 470-872 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - GA 067D FLOWEYBRCH GA
2021-07-29 470-873 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - GA 067D BOWDON GA
2021-07-29 470-874 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - GA 067D BREMEN GA
2021-07-29 470-876 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - GA 067D BUCHANAN GA
2021-07-29 470-971 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - GA 067D COVINGTON GA
2021-07-29 470-996 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - GA 067D CLERMONT GA
2021-07-29 470-997 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - GA 067D WINDER GA
2021-07-29 470-998 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - GA 067D CONYERS GA
2021-07-29 478-479 0XXX2XXX3XXX4XXX · 2 holders which blocks → ONVOY, LLC - GA 067D HADDOCK GA
2021-07-29 478-578 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - GA 067D DUBLIN GA
2021-07-29 478-778 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - GA 067D PERRY GA
2021-07-29 478-878 2XXX3XXX8XXX · 2 holders which blocks → ONVOY, LLC - GA 067D IDEAL GA
2021-07-29 505-491 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FARMINGTON NM
2021-07-29 505-493 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FARMINGTON NM
2021-07-29 517-293 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLCV - MI 543C LESLIE MI
2021-07-29 530-709 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MARYSVILLE CA
2021-07-29 548-268 not yet reported which blocks → Fibernetics Corporation 464D Arthur —
2021-07-29 548-269 not yet reported which blocks → Fibernetics Corporation 464D Dundalk —
2021-07-29 548-270 not yet reported which blocks → Fibernetics Corporation 464D Grand Valley —
2021-07-29 548-271 not yet reported which blocks → Fibernetics Corporation 464D Holstein —
2021-07-29 548-272 not yet reported which blocks → Fibernetics Corporation 464D Mount Forest —
2021-07-29 559-619 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 VISALIA CA
2021-07-29 562-540 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LONG BEACH CA
2021-07-29 572-202 0XXX1XXX2XXX3XXX4XXX8XXX · 3 holders which blocks → ONVOY, LLC - OK 409F ST LOUIS OK
2021-07-29 579-513 not yet reported which blocks → Fibernetics Corporation 464D Chateauguay —
2021-07-29 579-514 not yet reported which blocks → Fibernetics Corporation 464D Beauharnois —
2021-07-29 579-519 not yet reported which blocks → Fibernetics Corporation 464D Howick —
2021-07-29 582-209 4XXX which blocks → FRONTIER COMMUNICATIONS OF BREEZEWOOD, LLC 0149 BREEZEWOOD PA
2021-07-29 605-998 0XXX1XXX2XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - SD 162G MILLER SD
2021-07-29 606-300 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CORBIN KY
2021-07-29 606-381 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CORBIN KY
2021-07-29 618-760 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CENTRALIA IL
2021-07-29 657-514 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E BUENA PARK CA
2021-07-29 661-521 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2021-07-29 681-350 0–9 XXXall 10 · 4 holders which blocks → HD CARRIER LLC 321J KINGWOOD WV
2021-07-29 689-247 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 WINTERPARK FL
2021-07-29 727-284 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 STPETERSBG FL

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.