172.16.20.77 router login
To open the admin panel, type 172.16.20.77 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.
172.16.20.77 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 recorded default login for 172.16.20.77, and inventing one would be useless anyway since the credentials follow the physical device. Turn the unit over and read the sticker, which on most gear prints the factory web password alongside the serial number. If the sticker has been peeled off, the model's downloadable manual or the installing administrator is the next place to look.
How to log in to your router
Type 172.16.20.77 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 172.16.20.77, 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
Before reaching for the reset pin, try any recovery account the administrator may have created and check whether a configuration export exists. A full factory reset does work, but it wipes routing, DHCP reservations and access rules in one stroke, and returns the wireless SSID and passphrase to the label defaults. On a shared business segment that outage affects everyone using the subnet.
This address belongs to 172.16.0.0/12, an RFC 1918 range of 1,048,576 addresses defined by the netmask 255.240.0.0 and spanning the second octets 16 through 31. Networks that outgrow a single consumer subnet frequently land here, as do virtual lab environments, VPN pools and Docker default bridges. Because 172.0.0.0 as a whole is not private, only the 172.16 to 172.31 slice qualifies, which is a regular source of misconfiguration.
172.16.20.77 is the seventy-seventh host in 172.16.20.0/24, where usable addresses run from 172.16.20.1 to 172.16.20.254 and 172.16.20.255 carries broadcast traffic. Forty-five other addresses in this same /24 have documentation of their own, which suggests an actively used segment rather than an isolated one. Anyone searching for this specific number is typically tracing a device seen in a scan, an ARP table or a log line, and wants to identify it before connecting.
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 172.16.20.0/24
The 172.16.20.0/24 subnet runs from 172.16.20.1 to 172.16.20.254, with 172.16.20.255 reserved as the broadcast address. These are the addresses in it we hold router login details for.
All addresses we cover here
46 addresses in this subnet have a page; the most looked-up are listed here.