NumberResearch Membership · Data 09/24/2026

Recent prefix assignments

358 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026

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 31
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
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
2004-10-20 765-444 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 MIDDLETOWN IN
2004-10-20 803-380 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - SC 5258 BATH SC
2004-10-20 843-268 0–9 XXXall 10 · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - SC 5258 LAKE VIEW SC
2004-10-20 843-306 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - SC 5258 CLIO SC
2004-10-20 843-350 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - SC 5258 BLENHEIM SC
2004-10-20 843-400 0–9 XXXall 10 · 9 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - SC 5258 MCCOLL SC
2004-10-20 843-418 0–9 XXXall 10 · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - SC 5258 LATTA SC
2004-10-20 864-513 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - SC 5258 ANTIOCH SC
2004-10-20 956-773 4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LASARA TX
2004-10-20 985-464 0XXX1XXX2XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 GIBSON LA
2004-10-20 985-465 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 DULAC LA
2004-10-20 985-466 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 MONTEGUT LA
2004-10-20 985-467 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 PONCHATOUL LA
2004-10-20 985-664 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 RACELAND LA
2004-10-20 989-882 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 VASSAR MI
2004-10-19 202-598 0–9 XXXall 10 · 2 holders which blocks → VERIZON WASHINGTON DC, INC. 9211 WSHNGTNZN1 DC
2004-10-19 606-499 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MIDDLESBO KY
2004-10-19 615-686 0–9 XXXall 10 · 4 holders which blocks → LINGO TELECOM, LLC 5468 NASHVILLE TN
2004-10-19 678-928 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 GAINESVL GA
2004-10-19 706-610 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 COLUMBUS GA
2004-10-19 706-850 0–9 XXXwhole prefix which blocks → CHARTER IP ENABLED SERVICES, LLC 792K ATHENS GA
2004-10-19 787-606 0–9 XXXall 10 · 5 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 GUAYANILLA PR
2004-10-19 909-714 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FONTANA CA
2004-10-18 248-605 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 CLARKSTON MI
2004-10-18 269-308 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J HARTFORD MI
2004-10-18 269-815 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 BERRIENSPG MI
2004-10-18 269-820 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 THREE OAKS MI
2004-10-18 318-504 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 EPPS LA
2004-10-18 318-595 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 DUBACH LA
2004-10-18 336-505 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 KIMESVILLE NC
2004-10-18 347-694 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 NWYRCYZN06 NY
2004-10-18 352-310 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 OCKLAWAHA FL
2004-10-18 828-414 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 BLOWING RK NC
2004-10-18 971-227 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR
2004-10-18 989-262 0–9 XXXall 10 · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 FRANKENMTH MI
2004-10-18 989-741 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → WINN TELEPHONE COMPANY DBA WINN TELECOM - MI 0127 HARRISON MI
2004-10-15 203-998 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CT 4800 STAMFORD CT
2004-10-15 631-813 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 BRENTWOOD NY
2004-10-15 646-290 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
2004-10-15 646-509 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
2004-10-15 646-712 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
2004-10-15 646-873 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
2004-10-15 732-947 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 METUCHEN NJ
2004-10-15 931-319 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 COOKEVILLE TN
2004-10-15 940-394 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → BRIGHTSPEED OF EASTERN TEXAS, INC. 2084 BRIDGEPORT TX
2004-10-15 979-304 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 GIDDINGS TX
2004-10-14 309-304 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → FRONTIER NORTH, INC. - IL 1015 EUREKA IL
2004-10-14 410-202 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 SALISBURY MD
2004-10-14 575-219 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 CLOVIS NM
2004-10-14 585-489 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.