osorkon@hub:~$ curl -Is -v https://api.telegram.org/
*   Trying 149.154.167.220...
* TCP_NODELAY set
* Connected to api.telegram.org (149.154.167.220) port 443 (#0)
* ALPN, offering h2
* ALPN, offering http/1.1
* successfully set certificate verify locations:
*   CAfile: /etc/ssl/certs/ca-certificates.crt
  CApath: /etc/ssl/certs
* TLSv1.3 (OUT), TLS handshake, Client hello (1):
* TLSv1.3 (IN), TLS handshake, Server hello (2):
* TLSv1.3 (IN), TLS Unknown, Certificate Status (22):
* TLSv1.3 (IN), TLS handshake, Unknown (8):
* TLSv1.3 (IN), TLS Unknown, Certificate Status (22):
* TLSv1.3 (IN), TLS handshake, Certificate (11):
* TLSv1.3 (IN), TLS Unknown, Certificate Status (22):
* TLSv1.3 (IN), TLS handshake, CERT verify (15):
* TLSv1.3 (IN), TLS Unknown, Certificate Status (22):
* TLSv1.3 (IN), TLS handshake, Finished (20):
* TLSv1.3 (OUT), TLS change cipher, Client hello (1):
* TLSv1.3 (OUT), TLS Unknown, Certificate Status (22):
* TLSv1.3 (OUT), TLS handshake, Finished (20):
* SSL connection using TLSv1.3 / TLS_AES_256_GCM_SHA384
* ALPN, server accepted to use http/1.1
* Server certificate:
*  subject: OU=Domain Control Validated; CN=api.telegram.org
*  start date: May  4 14:42:31 2018 GMT
*  expire date: May 23 16:17:38 2020 GMT
*  subjectAltName: host "api.telegram.org" matched cert's "api.telegram.org"
*  issuer: C=US; ST=Arizona; L=Scottsdale; O=GoDaddy.com, Inc.; OU=http://certs.godaddy.com/repository/; CN=Go Daddy Secure Certificate Authority - G2
*  SSL certificate verify ok.
* TLSv1.3 (OUT), TLS Unknown, Unknown (23):
> HEAD / HTTP/1.1
> Host: api.telegram.org
> User-Agent: curl/7.58.0
> Accept: */*
>
* TLSv1.3 (IN), TLS Unknown, Certificate Status (22):
* TLSv1.3 (IN), TLS handshake, Newsession Ticket (4):
* TLSv1.3 (IN), TLS Unknown, Certificate Status (22):
* TLSv1.3 (IN), TLS handshake, Newsession Ticket (4):
* TLSv1.3 (IN), TLS Unknown, Unknown (23):
< HTTP/1.1 302 Moved Temporarily
HTTP/1.1 302 Moved Temporarily
< Server: nginx/1.16.1
Server: nginx/1.16.1
< Date: Wed, 01 Apr 2020 18:38:36 GMT
Date: Wed, 01 Apr 2020 18:38:36 GMT
< Content-Type: text/html
Content-Type: text/html
< Content-Length: 145
Content-Length: 145
< Connection: keep-alive
Connection: keep-alive
< Location: https://core.telegram.org/bots
Location: https://core.telegram.org/bots
< Strict-Transport-Security: max-age=31536000; includeSubDomains; preload
Strict-Transport-Security: max-age=31536000; includeSubDomains; preload
< Access-Control-Allow-Origin: *
Access-Control-Allow-Origin: *
< Access-Control-Allow-Methods: GET, POST, OPTIONS
Access-Control-Allow-Methods: GET, POST, OPTIONS
< Access-Control-Expose-Headers: Content-Length,Content-Type,Date,Server,Connection
Access-Control-Expose-Headers: Content-Length,Content-Type,Date,Server,Connection

<
* Connection #0 to host api.telegram.org left intact