NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026

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
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 15
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
Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2011-11-21 323-438 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 06 CA
2011-11-21 435-414 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 ST GEORGE UT
2011-11-21 443-970 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BALTIMORE MD
2011-11-21 443-972 0–9 XXXall 10 · 8 holders which blocks → PAETEC ITEL, LLC 829J CAMBRIDGE MD
2011-11-21 443-978 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 SALISBURY MD
2011-11-21 443-979 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 COLUMBIA MD
2011-11-21 443-981 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 FALLSTON MD
2011-11-21 450-693 not yet reported which blocks → Distributel 083E Longueuil —
2011-11-21 470-564 0–9 XXXall 10 · 3 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 ATLANTA NE GA
2011-11-21 571-328 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN19 VA
2011-11-21 571-353 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 HERNDON VA
2011-11-21 571-733 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2011-11-21 571-835 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2011-11-21 705-902 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Chapleau —
2011-11-21 707-387 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SANTA ROSA CA
2011-11-21 720-245 0–9 XXXall 10 · 4 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 3467 DENVER CO
2011-11-21 859-349 0–9 XXXall 10 · 3 holders which blocks → AT&T ENTERPRISES, LLC 516C PERRYVILLE KY
2011-11-21 859-423 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C MOORESVL KY
2011-11-21 859-535 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C MACKVILLE KY
2011-11-17 204-404 not yet reported which blocks → TELUS Mobility 8303 Stonewall —
2011-11-17 204-405 not yet reported which blocks → TELUS Mobility 8303 Sanford —
2011-11-17 204-406 not yet reported which blocks → TELUS Mobility 8303 Selkirk —
2011-11-17 204-407 not yet reported which blocks → TELUS Mobility 8303 Gimli —
2011-11-17 204-408 not yet reported which blocks → TELUS Mobility 8303 Steinbach —
2011-11-17 240-650 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - MD 876D WSHNGTNZN3 MD
2011-11-17 240-772 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 FREDERICK MD
2011-11-17 334-489 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K ENTERPRISE AL
2011-11-17 334-605 0–9 XXXall 10 · 4 holders which blocks → PINE BELT BROADCASTING DBA PINE BELT TEL COMP SVCS 9736 SELMA AL
2011-11-17 401-302 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - RI 6389 PROVIDENCE RI
2011-11-17 408-638 0–9 XXXall 10 · 7 holders which blocks → METROPCS, INC. 5562 SNJS WEST CA
2011-11-17 469-269 0–9 XXXall 10 · 4 holders which blocks → GRANDE COMMUNICATIONS NETWORKS, INC. - TX 7670 FRISCO TX
2011-11-17 469-305 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F FRISCO TX
2011-11-17 610-314 0–9 XXXall 10 · 4 holders which blocks → VERIZON PENNSYLVANIA, INC. 9208 W CHESTER PA
2011-11-17 704-870 0–9 XXXall 10 · 9 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 SALISBURY NC
2011-11-17 913-201 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 KANSASCITY KS
2011-11-17 931-281 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 TENNESSRDG TN
2011-11-16 269-301 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 MIDDLEVL MI
2011-11-16 404-907 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ATLANTA GA
2011-11-16 509-412 0–9 XXXall 10 · 7 holders which blocks → METROPCS, INC. 5562 PASCO WA
2011-11-16 513-413 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-11-16 574-201 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROCHESTER IN
2011-11-16 706-487 0–9 XXXall 10 · 9 holders which blocks → WINDSTREAM STANDARD, INC. 0386 BLAIRSVL GA
2011-11-16 706-915 0–9 XXXall 10 · 6 holders which blocks → WINDSTREAM STANDARD, INC. 0386 CORNELIA GA
2011-11-16 720-491 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LONGMONT CO
2011-11-16 845-670 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 NEWBURGH NY
2011-11-16 912-457 0XXX1XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → GEORGIA WINDSTREAM, INC. 4425 GLENNVILLE GA
2011-11-16 918-312 0–9 XXXall 10 · 2 holders which blocks → PINE TELEPHONE COMPANY DBA PINE CELL PHONES, INC. 235C TULSA OK
2011-11-16 931-348 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ERIN TN
2011-11-16 937-516 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 DAYTON OH
2011-11-16 940-209 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C BELLEVUE TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.