Would be useful to see the CIDR range your Router is using for DHCP. We can then confirm the router IP as Gateway
I'm going to guess you are using Windows.
Follow this link to open a command terminal window -
link
Once you are there - type the command below and hit enter. Screenshot or copy and paste the output to let us see.
ipconfig /all
Microsoft Windows [Version 10.0.22621.2861]
(c) Microsoft Corporation. All rights reserved.
C:\Users\tonyl>ipconfig/all
Windows IP Configuration
Host Name . . . . . . . . . . . . : DESKTOP-S1FDG7L
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
Ethernet adapter Ethernet:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek PCIe GbE Family Controller
Physical Address. . . . . . . . . : 80-FA-5B-7B-9B-B4
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Unknown adapter Local Area Connection:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : TAP-Windows Adapter V9
Physical Address. . . . . . . . . : 00-FF-F6-C2-4A-B3
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Wireless LAN adapter Local Area Connection* 1:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft Wi-Fi Direct Virtual Adapter #3
Physical Address. . . . . . . . . : 34-CF-F6-E0-77-C6
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Wireless LAN adapter Local Area Connection* 12:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft Wi-Fi Direct Virtual Adapter #4
Physical Address. . . . . . . . . : 36-CF-F6-E0-77-C5
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Wireless LAN adapter WiFi:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Intel(R) Wi-Fi 6 AX200 160MHz
Physical Address. . . . . . . . . : 34-CF-F6-E0-77-C5
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::eb57:607f:214e:46db%16(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.100.16(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : 23 December 2023 08:39:01
Lease Expires . . . . . . . . . . : 23 December 2023 09:39:00
Default Gateway . . . . . . . . . : 192.168.100.1
DHCP Server . . . . . . . . . . . : 192.168.100.1
DHCPv6 IAID . . . . . . . . . . . : 339005430
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-26-BA-DB-28-80-FA-5B-7B-9B-B4
DNS Servers . . . . . . . . . . . : 192.168.100.1
NetBIOS over Tcpip. . . . . . . . : Enabled
Ethernet adapter Bluetooth Network Connection 2:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Bluetooth Device (Personal Area Network) #2
Physical Address. . . . . . . . . : 34-CF-F6-E0-77-C9
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
C:\Users\tonyl>Wireless LAN adapter WiFi:
'Wireless' is not recognized as an internal or external command,
operable program or batch file.
C:\Users\tonyl>
C:\Users\tonyl> Connection-specific DNS Suffix . :
'Connection-specific' is not recognized as an internal or external command,
operable program or batch file.
C:\Users\tonyl> Description . . . . . . . . . . . : Intel(R) Wi-Fi 6 AX200 160MHz
'Description' is not recognized as an internal or external command,
operable program or batch file.
C:\Users\tonyl> Physical Address. . . . . . . . . : 34-CF-F6-E0-77-C5
'Physical' is not recognized as an internal or external command,
operable program or batch file.
C:\Users\tonyl> DHCP Enabled. . . . . . . . . . . : Yes
'DHCP' is not recognized as an internal or external command,
operable program or batch file.
C:\Users\tonyl> Autoconfiguration Enabled . . . . : Yes
'Autoconfiguration' is not recognized as an internal or external command,
operable program or batch file.
C:\Users\tonyl> Link-local IPv6 Address . . . . . : fe80::eb57:607f:214e:46db%16(Preferred)
'Link-local' is not recognized as an internal or external command,
operable program or batch file.
C:\Users\tonyl> IPv4 Address. . . . . . . . . . . : 192.168.100.16(Preferred)
'IPv4' is not recognized as an internal or external command,
operable program or batch file.
C:\Users\tonyl> Subnet Mask . . . . . . . . . . . : 255.255.255.0
'Subnet' is not recognized as an internal or external command,
operable program or batch file.
C:\Users\tonyl> Lease Obtained. . . . . . . . . . : 23 December 2023 08:39:01
'Lease' is not recognized as an internal or external command,
operable program or batch file.
C:\Users\tonyl> Lease Expires . . . . . . . . . . : 23 December 2023 09:39:00
'Lease' is not recognized as an internal or external command,
operable program or batch file.
C:\Users\tonyl> Default Gateway . . . . . . . . . : 192.168.100.1
'Default' is not recognized as an internal or external command,
operable program or batch file.
C:\Users\tonyl> DHCP Server . . . . . . . . . . . : 192.168.100.1
'DHCP' is not recognized as an internal or external command,
operable program or batch file.
C:\Users\tonyl> DHCPv6 IAID . . . . . . . . . . . : 339005430
'DHCPv6' is not recognized as an internal or external command,
operable program or batch file.
C:\Users\tonyl> DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-26-BA-DB-28-80-FA-5B-7B-9B-B4
'DHCPv6' is not recognized as an internal or external command,
operable program or batch file.
C:\Users\tonyl> DNS Servers . . . . . . . . . . . : 192.168.100.1
'DNS' is not recognized as an internal or external command,
operable program or batch file.
C:\Users\tonyl> NetBIOS over Tcpip. . . . . . . . : Enabled
'NetBIOS' is not recognized as an internal or external command,
operable program or batch file.
C:\Users\tonyl>
C:\Users\tonyl>Ethernet adapter Bluetooth Network Connection 2:
'Ethernet' is not recognized as an internal or external command,
operable program or batch file.
C:\Users\tonyl>
C:\Users\tonyl> Media State . . . . . . . . . . . : Media disconnected
'Media' is not recognized as an internal or external command,
operable program or batch file.
C:\Users\tonyl> Connection-specific DNS Suffix . :
'Connection-specific' is not recognized as an internal or external command,
operable program or batch file.
C:\Users\tonyl> Description . . . . . . . . . . . : Bluetooth Device (Personal Area Network) #2
'Description' is not recognized as an internal or external command,
operable program or batch file.
C:\Users\tonyl> Physical Address. . . . . . . . . : 34-CF-F6-E0-77-C9
'Physical' is not recognized as an internal or external command,
operable program or batch file.
C:\Users\tonyl> DHCP Enabled. . . . . . . . . . . : Yes
'DHCP' is not recognized as an internal or external command,
operable program or batch file.
C:\Users\tonyl> DHCP Enabled. . . . . . . . . . . : Yes