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
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2004-09-01 206-259 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 VASHON WA
2004-09-01 450-861 not yet reported which blocks → Fido Solutions Inc. 5643 Laval-Est —
2004-09-01 450-869 not yet reported which blocks → Fido Solutions Inc. 5643 St-Vincent-de-Paul —
2004-09-01 450-891 not yet reported which blocks → Fido Solutions Inc. 5643 Boucherville —
2004-09-01 450-892 not yet reported which blocks → Fido Solutions Inc. 5643 Longueuil —
2004-09-01 450-893 not yet reported which blocks → Fido Solutions Inc. 5643 St-Bruno —
2004-09-01 450-896 not yet reported which blocks → Fido Solutions Inc. 5643 St-Lambert —
2004-09-01 514-628 not yet reported which blocks → Fido Solutions Inc. 5643 Roxboro —
2004-09-01 514-698 not yet reported which blocks → Fido Solutions Inc. 5643 Pointe-Claire —
2004-09-01 601-204 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 XXXXXXXXXX MS
2004-09-01 601-220 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 XXXXXXXXXX MS
2004-09-01 601-958 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 CROSSROADS MS
2004-09-01 609-963 0–9 XXXall 10 · 5 holders which blocks → VERIZON NEW JERSEY, INC. 9206 EWING NJ
2004-09-01 808-206 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HONOLULU HI
2004-09-01 808-212 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LIHUE HI
2004-09-01 808-213 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 KAUNAKAKAI HI
2004-09-01 808-214 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WAILUKU HI
2004-09-01 808-215 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LANAI CITY HI
2004-09-01 808-217 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HILO HI
2004-09-01 816-977 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MO 4932 KANSASCITY MO
2004-08-31 256-665 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL 7469 HUNTSVILLE AL
2004-08-31 352-290 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J ORANGE SPG FL
2004-08-31 580-612 not yet reported which blocks → PINE TELEPHONE COMPANY DBA PINE CELL PHONES, INC. 235C IDABEL OK
2004-08-31 585-662 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 TELECOM OF NEW YORK, LP - NY 8473 EROCHESTER NY
2004-08-31 618-416 0–9 XXXall 10 · 3 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K BELLEVILLE IL
2004-08-31 910-778 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC 7835 FAYETTEVL NC
2004-08-30 231-233 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 LUDINGTON MI
2004-08-30 309-509 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 GALESBURG IL
2004-08-30 347-789 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN06 NY
2004-08-30 740-954 0–9 XXXall 10 · 8 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 ASHVILLE OH
2004-08-30 832-402 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → PEERLESS NETWORK OF TEXAS, LLC - TX 177F CYPRESS TX
2004-08-30 843-401 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC 8534 KINGSTREE SC
2004-08-30 850-295 0–9 XXXall 10 · 5 holders which blocks → POWERTEL JACKSONVILLE LICENSES, INC. 7472 PERRY FL
2004-08-30 865-859 0–9 XXXall 10 · 2 holders which blocks → CITIZENS TELECOM VOL ST LLC DBA FRONTIER VOL STATE 0577 POWELL TN
2004-08-30 919-707 0–9 XXXwhole prefix which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 RALEIGH NC
2004-08-30 936-504 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → PEERLESS NETWORK OF TEXAS, LLC - TX 177F DAYTON TX
2004-08-30 936-506 0XXX2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → PEERLESS NETWORK OF TEXAS, LLC - TX 177F WILLIS TX
2004-08-30 936-508 2XXX3XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → PEERLESS NETWORK OF TEXAS, LLC - TX 177F SANAUGUSTN TX
2004-08-30 936-509 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → PEERLESS NETWORK OF TEXAS, LLC - TX 177F WALLER TX
2004-08-30 989-709 3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 GLADWIN MI
2004-08-27 336-522 0XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 GREENSBORO NC
2004-08-27 480-262 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2004-08-27 509-209 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 TELECOM OF WASHINGTON, LLC - WA 7455 SPOKANE WA
2004-08-27 601-988 2XXX3XXX4XXX5XXX7XXX8XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 JACKSON MS
2004-08-26 217-218 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHARLESTON IL
2004-08-26 519-212 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Hespeler —
2004-08-26 519-261 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Mount Forest —
2004-08-26 606-200 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J PIKEVILLE KY
2004-08-26 956-205 0–9 XXXall 10 · 4 holders which blocks → SOUTHWESTERN BELL 9533 MISSION TX
2004-08-25 229-236 not yet reported which blocks → CITY OF THOMASVILLE 6145 THOMASVL GA

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.