Ping a site with a known IP address, such as yahoo, some site you know is on line. If you can ping it with the ip and not by name, you need to specify the DNS server(s).
Atari 600 XL Vintage Home Computer - New in Box, Unused
$200.00
Vintage Family owned Atari 1200xl computer sold as is tested turns on with cable
$299.99
Atari Power Cube 800XL, 600XL, 65XE, 130XE USB-C Power Supply PSU
$11.25
A8picoCart Atari 130 / 65 XE 800 / 1200 XL XEGS multicart UnoCart clone game
$32.95
Vintage Atari 800XL ~ Home Computer in Original Box ~ Tested and Working
$149.90
Atari 1050 5.25" Floppy Disk Drive Tested (w/Power cables)
$99.99
RARE San Jose Computer Special Edition 810 5 1/4" Floppy Disc Drive Atari 8-bit
$195.00
Atari 600 XL Computer In Original Box Matching Serial NTSC USA 820XE120014001450
$169.00
Atari 600xl excellent condition - Video and RAM upgrades. 800XL compatible
$255.00
Ms. Pac-Man Game Cartridge Atari TI99/4A TI-99/4A 1983 MS PACMAN UNTESTED/AS IS
$21.24