172.20.20.20 router login
To open the admin panel, type 172.20.20.20 into your browser's address bar. If the page does not load, this is probably not the gateway address on your network — see the checks below.
172.20.20.20 router passwords
Where to find them:
- The label on the underside or back of the router — most manufacturers print the default admin username, password and Wi-Fi key there.
- The quick-start card or manual that came in the box.
- Your ISP's account portal, if the device was supplied by them — many set a unique password per line rather than a shared default.
There is no documented default user name and password for 172.20.20.20. In a lab or test build, whoever created the topology chose the credentials, and they will be in the build notes or configuration templates. For physical equipment, the shipped defaults are printed on the device label or given in its model-specific manual, which are the only reliable sources.
How to log in to your router
Type 172.20.20.20 into your browser's address bar and press Enter. Type it by hand rather than accepting an autocomplete suggestion, which often fills in a different address you visited before.
If the browser reports that it cannot reach 172.20.20.20, this is not the gateway address on your network. On Windows run ipconfig /all and read the Default Gateway line; on macOS open System Settings, Network, Details, TCP/IP; on Linux run ip route and read the address after "default via".
If the login page loads but rejects your credentials, and you have never changed them, use the defaults printed on the device's label. If they have been changed and nobody knows the new password, a factory reset is the only way back in.
If you do not know the password
Losing the password to a lab device is usually cheap to fix by rebuilding it, and that is often faster than a reset. On real hardware, holding the reset button restores the factory image and wipes the running configuration entirely, including interface addressing, routing and access control. Wireless models also revert their network name and passphrase to the values shown on the label.
This address sits in 172.16.0.0/12, the private allocation covering 172.16.x.x through 172.31.x.x, 1,048,576 addresses in total with a 255.240.0.0 netmask. It is the range most often chosen by mid-size businesses and by engineers building lab topologies, partly because it is less crowded by home equipment than the consumer range. Its subnet, 172.20.20.0/24, provides usable addresses from 172.20.20.1 to 172.20.20.254 and uses 172.20.20.255 as the broadcast address.
The repeating 20.20.20 pattern is the kind of memorable value people assign deliberately in test environments, training setups and documentation examples, though the repetition itself grants the address no special status and it is not a usual gateway position. Anyone reading this page has generally encountered the address in a lab guide, a configuration file or a capture and wants to confirm what it represents.
Whois information for 172.16.0.0/12
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2024, American Registry for Internet Numbers, Ltd.
#
NetRange: 172.16.0.0 - 172.31.255.255
CIDR: 172.16.0.0/12
NetName: PRIVATE-ADDRESS-BBLK-RFC1918-IANA-RESERVED
NetHandle: NET-172-16-0-0-1
Parent: ()
NetType: IANA Special Use
OriginAS:
Organization: Internet Assigned Numbers Authority (IANA)
RegDate: 1994-03-15
Updated: 2013-08-30
Comment: These addresses are in use by many millions of independently operated networks, which might be as small as a single computer connected to a home gateway, and are automatically configured in hundreds of millions of devices. They are only intended for use within a private context and traffic that needs to cross the Internet will need to use a different, unique address.
Comment:
Comment: These addresses can be used by anyone without any need to coordinate with IANA or an Internet registry. The traffic from these addresses does not come from ICANN or IANA. We are not the source of activity you may see on logs or in e-mail records. Please refer to http://www.iana.org/abuse/answers
Comment:
Comment: These addresses were assigned by the IETF, the organization that develops Internet protocols, in the Best Current Practice document, RFC 1918 which can be found at:
Comment: http://datatracker.ietf.org/doc/rfc1918
Ref: https://rdap.arin.net/registry/ip/172.16.0.0
OrgName: Internet Assigned Numbers Authority
OrgId: IANA
Address: 12025 Waterfront Drive
Address: Suite 300
City: Los Angeles
StateProv: CA
PostalCode: 90094
Country: US
RegDate:
Updated: 2012-08-31
Ref: https://rdap.arin.net/registry/entity/IANA
OrgAbuseHandle: IANA-IP-ARIN
OrgAbuseName: ICANN
OrgAbusePhone: +1-310-301-5820
OrgAbuseEmail: abuse@iana.org
OrgAbuseRef: https://rdap.arin.net/registry/entity/IANA-IP-ARIN
OrgTechHandle: IANA-IP-ARIN
OrgTechName: ICANN
OrgTechPhone: +1-310-301-5820
OrgTechEmail: abuse@iana.org
OrgTechRef: https://rdap.arin.net/registry/entity/IANA-IP-ARIN
Other documented addresses in 172.20.20.0/24
The 172.20.20.0/24 subnet runs from 172.20.20.1 to 172.20.20.254, with 172.20.20.255 reserved as the broadcast address. These are the addresses in it we hold router login details for.
All addresses we cover here
13 addresses in this subnet have a page; the most looked-up are listed here.