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IPv4 Address

1.0.0.1

Geolocation, ISP/ASN and reverse-DNS details for this address. Looking for your own IP? Check it on the home page →

IPv4 ADDRESS
1.0.0.1
REVERSE DNS / HOSTNAME
one.one.one.one
ADDRESS TYPE
Public (globally routable)
NETWORK RANGE
1.0.0.0/24

Geo ASN & City Infos

ASN / ISP
AS Number
AS13335
Organization
Cloudflare, Inc.
Network
1.0.0.0/24
City
Continent
Not available
Continent Code
Not available
Country
Not available
Country ISO
Not available
Region
Not available
Region ISO
Not available
City
Not available
Postal Code
Not available
Timezone
Not available
Coordinates
Not available
Accuracy Radius (km)
Not available

Blacklist (DNSBL) Status

✓ Not listed: 1.0.0.1 is clean on all 8 DNS blocklists we check (Spamhaus ZEN, SpamCop, Barracuda and others).

Run a full blacklist check (per-list details & delisting steps) →

Lookups run locally. We never log or store the IPs you check.

What This Page Shows

This page turns the raw IP 1.0.0.1 into the public information registered against it: its approximate geolocation, the ISP or organization that owns it, its ASN, and its reverse-DNS hostname. What it cannot show is a person's name, their exact home address, or what they do online. Read more on what an IP can and can't reveal →

Geolocation is an estimate, not a GPS fix, and is regularly off by miles. See public vs private IP addresses.

Frequently Asked Questions

Who owns the IP address 1.0.0.1?
1.0.0.1 is part of a network operated by Cloudflare, Inc. (AS13335). That is the ISP or organization announcing the address on the internet, which can differ from the person or website actually using it.
What is the reverse DNS hostname of 1.0.0.1?
The reverse-DNS (PTR) record for 1.0.0.1 is one.one.one.one. Reverse DNS maps an IP back to a hostname and is set by whoever controls the address.
Is 1.0.0.1 on a spam blacklist?
No. 1.0.0.1 is currently not listed on any of the 8 DNS blocklists we check (including Spamhaus ZEN, SpamCop and Barracuda). Listings change over time, so re-check before relying on this.

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