172.16.100.100 router login
To open the admin panel, type 172.16.100.100 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.
172.16.100.100 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 this address. Anything answering on 172.16.100.100 was configured locally, so its credentials come from its own documentation rather than from a shared list. Look for a sticker on the underside or back panel, the quick-start card in the box, or the vendor manual. For anything provisioned by an employer or hosting provider, the account details come from them.
How to log in to your router
Type 172.16.100.100 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 172.16.100.100, 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
When the password is lost, the practical options are the device's own recovery mode, a documented console procedure, or a hardware reset. A reset returns the unit to shipped defaults and wipes what was configured on it, including routing, port forwarding and any wireless SSID and passphrase, which fall back to the printed label values. On a lab or container host, expect to rebuild the configuration afterwards.
This address belongs to 172.16.0.0/12, the middle RFC 1918 range. It covers 172.16.x.x through 172.31.x.x, uses a 255.240.0.0 netmask and holds 1,048,576 addresses. It is a frequent choice for mid-size business networks, lab builds, VPN subnets and Docker's default bridge networking, and it is regularly mistaken for public space because 172 addresses outside the 16-to-31 window really are routable on the internet.
Within that range, 172.16.100.100 falls in the 172.16.100.0/24 subnet: usable hosts 172.16.100.1 through 172.16.100.254, broadcast at 172.16.100.255. Host 100 is a round number that administrators and DHCP pools both favour for ordinary endpoints, and it is not a position routers usually occupy. Visitors typically arrive after spotting it in a container inspect output, a VPN route table or an office network scan.
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/
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# 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 172.16.100.0/24
The 172.16.100.0/24 subnet runs from 172.16.100.1 to 172.16.100.254, with 172.16.100.255 reserved as the broadcast address. These are the addresses in it we hold router login details for.
All addresses we cover here
26 addresses in this subnet have a page; the most looked-up are listed here.