Callback.co's availability was analyzed 3 times during the 1 987 day time frame that began on June 11, 2019. Out of every uptime test completed, callback.co was accessible 3 times, most recently evidenced by the 200 status response on March 20, 2024. No instances of callback.co being inaccessible were observed during all the tests conducted as of November 19, 2024. There was no error status code returned as of November 19, 2024, according to all responses received. The response from callback.co on March 20, 2024, was received in 0.250 seconds, compared to an average of 0.892 seconds.