NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 26
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
2023-03-10 689-301 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 SANFORD FL
2023-03-10 707-906 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ROSA CA
2023-03-10 747-332 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 VAN NUYS CA
2023-03-10 779-367 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NUSO, LLC 732J SYCAMORE IL
2023-03-10 816-314 0XXX1XXX2XXX · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K E ATCHISON MO
2023-03-10 830-470 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 BOERNE TX
2023-03-10 840-225 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 POMONA CA
2023-03-10 854-241 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 MARION SC
2023-03-10 858-340 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LA JOLLA CA
2023-03-10 872-328 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN06 IL
2023-03-10 920-806 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J APPLETON WI
2023-03-10 920-814 0–9 XXXall 10 · 2 holders which blocks → TDS METROCOM, LLC 520K SHEBOYGAN WI
2023-03-10 920-816 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → TDS METROCOM, LLC 520K MANITOWOC WI
2023-03-10 928-490 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 LKHAVASUCY AZ
2023-03-10 941-325 0–9 XXXall 10 · 4 holders which blocks → AT&T - LOCAL 7421 MYAKKA FL
2023-03-10 949-746 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LAGUNA BCH CA
2023-03-10 959-248 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 732J HARTFORD CT
2023-03-09 218-619 8XXX9XXX which blocks → HD CARRIER LLC 321J DULUTH MN
2023-03-09 220-246 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 PATASKALA OH
2023-03-09 320-472 0XXX1XXX8XXX9XXX · 2 holders which blocks → HD CARRIER LLC 321J ST CLOUD MN
2023-03-09 346-627 0–9 XXXall 10 · 3 holders which blocks → LEAP TELECOM, LLC 616J HSTNSUBURB TX
2023-03-09 361-369 0–9 XXXall 10 · 2 holders which blocks → HD CARRIER LLC 321J C CHRISTI TX
2023-03-09 385-517 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2023-03-09 385-518 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2023-03-09 409-306 0XXX1XXX2XXX8XXX9XXX · 3 holders which blocks → HD CARRIER LLC 321J BEAUMONT TX
2023-03-09 458-298 0–9 XXXall 10 · 4 holders which blocks → HD CARRIER LLC 321J EUGENE OR
2023-03-09 480-943 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2023-03-09 507-906 0XXX8XXX9XXX · 2 holders which blocks → HD CARRIER LLC 321J ROCHESTER MN
2023-03-09 520-669 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 7465 SIERRAVIST AZ
2023-03-09 520-671 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 7465 SIERRAVIST AZ
2023-03-09 520-672 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 7465 SIERRAVIST AZ
2023-03-09 520-673 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 7465 SIERRAVIST AZ
2023-03-09 520-674 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 7465 SIERRAVIST AZ
2023-03-09 567-398 0–9 XXXall 10 · 3 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J MANSFIELD OH
2023-03-09 602-662 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2023-03-09 623-305 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2023-03-09 680-254 0–9 XXXall 10 · 2 holders which blocks → HD CARRIER LLC 321J SYRACUSE NY
2023-03-09 726-238 0–9 XXXall 10 · 3 holders which blocks → LEAP TELECOM, LLC 616J SANANTONIO TX
2023-03-09 806-821 0–9 XXXall 10 · 2 holders which blocks → HD CARRIER LLC 321J AMARILLO TX
2023-03-09 826-217 8XXX9XXX which blocks → HD CARRIER LLC 321J HARRISONBG VA
2023-03-09 940-530 8XXX9XXX which blocks → HD CARRIER LLC 321J WICHITAFLS TX
2023-03-09 956-809 8XXX9XXX which blocks → HD CARRIER LLC 321J HARLINGEN TX
2023-03-09 980-427 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E HUNTERSVL NC
2023-03-08 224-494 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DUNDEE IL
2023-03-08 260-328 0–9 XXXall 10 · 6 holders which blocks → HD CARRIER LLC 321J FORT WAYNE IN
2023-03-08 272-315 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 HAZLETON PA
2023-03-08 305-540 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MIAMI FL
2023-03-08 309-920 1XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → HD CARRIER LLC 321J BLOOMINGTN IL
2023-03-08 447-252 0–9 XXXall 10 · 2 holders which blocks → HD CARRIER LLC 321J MATTOON IL
2023-03-08 478-367 0–9 XXXall 10 · 4 holders which blocks → HD CARRIER LLC 321J MACON GA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.