10.21.90.163 router login
To open the admin panel, type 10.21.90.163 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.
10.21.90.163 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 are no documented default credentials for 10.21.90.163, and supplying a guess would be worse than saying so. Identify what is listening on the address, then take the login details from that unit's own label, its printed or downloadable manual, or the configuration notes left by the ISP or administrator who deployed it on this network.
How to log in to your router
Type 10.21.90.163 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 10.21.90.163, 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
If access is lost entirely, a factory reset will clear the unknown password. Recognise what disappears with it: the complete saved configuration, including any static addressing that placed the device in this subnet, plus firewall and service settings, and the wireless SSID and passphrase return to the values printed on the label. Plan for reconfiguring the device and reconnecting clients afterwards.
10.21.90.163 is drawn from 10.0.0.0/8, the private range RFC 1918 sets aside alongside 172.16.0.0/12 and 192.168.0.0/16. It offers 16,777,216 addresses under a 255.0.0.0 netmask, and structured second and third octets like 21 and 90 usually reflect a deliberate addressing scheme, mapping to a site, floor, department or VLAN as the network's designer defined it.
Locally the address belongs to 10.21.90.0/24, whose hosts span 10.21.90.1 to 10.21.90.254 with broadcast at 10.21.90.255. Host 163 is a high-numbered position of the sort DHCP hands out dynamically, so the same number may describe different machines on different days. Typical visitors are trying to match the address to a device seen in a lease table, an access log or a monitoring alert. No other addresses from this /24 appear in our records at present.
Whois information for 10.0.0.0/8
# 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: 10.0.0.0 - 10.255.255.255
CIDR: 10.0.0.0/8
NetName: PRIVATE-ADDRESS-ABLK-RFC1918-IANA-RESERVED
NetHandle: NET-10-0-0-0-1
Parent: ()
NetType: IANA Special Use
OriginAS:
Organization: Internet Assigned Numbers Authority (IANA)
RegDate: 1995-06-23
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/10.0.0.0
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