IPv4Loopback
127.0.0.1
Loopback address · 127.0.0.0/8
Look up another IP
127.0.0.1 is a loopback address
127.0.0.0/8 · RFC 1122
Loopback addresses point back at the device you are using. Traffic sent here never leaves the machine, which is why 127.0.0.1 (and ::1 in IPv6) is known as "localhost" and used to test local services.
Because it isn't routable on the public internet, there is no public location or ISP to show. To see the public address your network uses, open What's My IP.
Technical details
- IP version
- IPv4
- Decimal
- 2130706433
- Hexadecimal
- 0x7F000001
- Binary
- 01111111.00000000.00000000.00000001
- IPv4-mapped IPv6
- ::ffff:7f00:1
- Reverse DNS zone
- 1.0.0.127.in-addr.arpa
- Legacy class
- Class A
Keep exploring
More free network tools
What's My IP
Your public IP address, location and ISP the moment the page loads. Copy it in one click.
Open toolDNS Lookup
Query live DNS records for any domain to verify mail, SPF, DKIM and nameserver setup.
Open toolSubnet Calculator
Network, broadcast and usable host range for any IPv4 subnet, with binary breakdowns.
Open tool