Analysis report on IP address: 204.253.48.227

204.253.48.227 has no website

Generated on
21 Jul 2021 18:45
Duration of the analysis
22.0s
Share

Score 100%
A
DNS
-
IP
A
MAIL
-
WEB
A

Congratulation

Your domain is really well configured

DNS

Dns servers for 48.253.204.in-addr.arpa

204.253.48.227 was detected as ipv4

There is no Dns server for this domain

Possible problem in Dns Tree

We have detected the followings errors on one or more server(s).
Consult Tree for more details.

  • Unknown error
  • Server failure or format error
  • Refuse to respond or is in timeout state.

Query informations

Server
j.root-servers.net
[ 192.58.128.30 ]
Duration
10 ms
Type
authority
Headers
RCODE : 0 AA : 0 TC : 0

Response

Query informations

Server
a.in-addr-servers.arpa
[ 199.180.182.53 ]
Duration
142 ms
Type
authority
Headers
RCODE : 0 AA : 0 TC : 0

Response

Query informations

Server
b.in-addr-servers.arpa
[ 199.253.183.183 ]
Duration
35 ms
Type
authority
Headers
RCODE : 0 AA : 0 TC : 0

Response

Query informations

Server
c.in-addr-servers.arpa
[ 196.216.169.10 ]
Duration
179 ms
Type
authority
Headers
RCODE : 0 AA : 0 TC : 0

Response

Query informations

Server
d.in-addr-servers.arpa
[ 200.10.60.53 ]
Duration
224 ms
Type
authority
Headers
RCODE : 0 AA : 0 TC : 0

Response

Query informations

Server
e.in-addr-servers.arpa
[ 203.119.86.101 ]
Duration
257 ms
Type
authority
Headers
RCODE : 0 AA : 0 TC : 0

Response

Query informations

Server
f.in-addr-servers.arpa
[ 193.0.9.1 ]
Duration
18 ms
Type
authority
Headers
RCODE : 0 AA : 0 TC : 0

Response

Query informations

Server
arin.authdns.ripe.net
[ 193.0.9.10 ]
Duration
216 ms
Type
authority
Headers
RCODE : 0 AA : 0 TC : 0

Response

Query informations

Server
r.arin.net
[ 199.180.180.63 ]
Duration
139 ms
Type
authority
Headers
RCODE : 0 AA : 0 TC : 0

Response

Query informations

Server
u.arin.net
[ 204.61.216.50 ]
Duration
3 ms
Type
authority
Headers
RCODE : 0 AA : 0 TC : 0

Response

Query informations

Server
x.arin.net
[ 199.180.180.63 ]
Duration
139 ms
Type
authority
Headers
RCODE : 0 AA : 0 TC : 0

Response

Query informations

Server
y.arin.net
[ 192.82.134.30 ]
Duration
16 ms
Type
authority
Headers
RCODE : 0 AA : 0 TC : 0

Response

Query informations

Server
z.arin.net
[ 199.212.0.63 ]
Duration
84 ms
Type
authority
Headers
RCODE : 0 AA : 0 TC : 0

Response

Query informations

Server
auth03.ns.uu.net
[ 198.6.1.83 ]
Duration
95 ms
Type
server_failure
Headers
RCODE : 5 AA : 0 TC : 0

The name server was unable to process this dns query due to a problem with the name server

Server refused to answer when edns query is performed.

Query informations

Server
auth51.ns.uu.net
[ 198.6.1.162 ]
Duration
101 ms
Type
authority
Headers
RCODE : 0 AA : 0 TC : 0

Response

Name
ns1.costar.com
IPs
  • No IP
Name
ns2.costar.com
IPs
  • No IP
DNSSEC analysis not possible on an IP

Ip

Informations

Ip
204.253.48.227
Type
ipv4
Reverse
cg04pfagprd501.costar.com
ARPA
227.48.253.204.in-addr.arpa
Class C
204.253.48.0/24
ASN
11160 COSTAR-SANDIEGO
Organisation
 
Maintainer
 

Reputation

Blacklists
Ip
Whois server
whois.arin.net
Raw data
#
# 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/
#
# Copyright 1997-2021, American Registry for Internet Numbers, Ltd.
#


MCI Communications Services, Inc. d/b/a Verizon Business UUNETCBLK252 (NET-204-252-0-0-1) 204.252.0.0 - 204.255.255.255
COSTAR REALTY UU-204-253-48-D6 (NET-204-253-48-0-1) 204.253.48.0 - 204.253.48.255



#
# 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/
#
# Copyright 1997-2021, American Registry for Internet Numbers, Ltd.
#

Blacklists

RFC Ignorant
Rbl Jp
RblDns
Sorbs
Spam Eating Monkey
SpamHaus
SuRbl
Support Intelligence
Swinog
UriBl

Ip is not blacklisted

Passed

An ip must not be blacklisted or it will be penalized for referencing and deliverability of emails.

0.000s

Mail

Mail servers

Name
cg04pfagprd501.costar.com
IP
204.253.48.227
Banner
220 cg04pfagprd501.costar.com ESMTP Wed, 21 Jul 2021 11:46:24 -0700
Name
cg04pfagprd501.costar.com
IP
204.253.48.227
Banner
220 cg04pfagprd501.costar.com ESMTP Wed, 21 Jul 2021 11:46:24 -0700
Starttls
yes
Dane
no
Mail size
0 Bytes
Expn
no
Vrfy
no

Smtp simulation

Connection to cg04pfagprd501.costar.com ...
220 cg04pfagprd501.costar.com ESMTP Wed, 21 Jul 2021 11:46:24 -0700
HELO domain.com
250 cg04pfagprd501.costar.com Hello ns.tools [195.154.82.101], pleased to meet you
EHLO domain.com
250-cg04pfagprd501.costar.com Hello ns.tools [195.154.82.101], pleased to meet you
250-ENHANCEDSTATUSCODES
250-PIPELINING
250-8BITMIME
250 STARTTLS
QUIT
221 2.0.0 cg04pfagprd501.costar.com Closing connection
Autodiscover analysis not possible on an IP

MX IPs have reverse

Passed

When a sending server makes a connection to the recipient server, the recipient server notes the sending IP address and performs a reverse lookup, called a PTR lookup, named after the type of DNS record used. If the result of the reverse lookup matches the result of a forward DNS Lookup, then it's much more likely that the message is legitimate. If the IP address doesn't match, it's much more likely that the sending address was spoofed and therefore much more likely that it's unwanted and could be considered spam.

documentation

0.000s

HELO command is accepted

Passed

According to the RFC 2181, smtp server should accept HELO command

RFC

0.000s

EHLO command is accepted

Passed

According to the RFC 2181, smtp server should accept EHLO command

RFC

0.000s

STARTTLS command is accepted

Passed

STARTTLS turns an unencrypted connection into a secure connection. Note: You can use a service like altospam to solve this problem. Click on the link below to learn more

0.000s

EXPN command is refused

Passed

EXPN command is now considered to be a security risk, spammers being able to harvest valid e-mail addresses via each mailing list.

0.000s

VRFY command is refused

Passed

As the EXPN command, VRFY is used by spammers to verify an address.

0.000s

MX servers are not open relay

Passed

If a server is open relay, there is a risk that spammers use your server to send illegitimate mail.

1.457s

Banner return 2xx or 4xx code

Passed

The banner must return (2xx) a valid (4xx) or temporary code.

0.000s

Banner return server name

Passed

Banner must contain the name of the server

0.000s

SMTP server type is hidden

Passed

There is a risk to display the type and the version of the server, because people can find a breach for a specific version and use it

0.000s

MX servers are accessibles

Skipped

Smtp servers that are listed in DNS area must be accessible, otherwise, there is a risk that emails may be lost

0.000s

MX servers accept abuse@ address

Skipped

According to the RFC 2142, SMTP server should accept abuse@yourDomain as a recipient.

RFC

0.000s

MX servers accept postmaster@ address

Skipped

According to the RFC 5321, SMTP server should accept postmaster@yourDomain as a recipient.

RFC

0.000s

Web

There is no web server. Please test cg04pfagprd501.costar.com.

Url
http://204.253.48.227/
Timeout
Yes
Url
https://204.253.48.227/
Timeout
Yes

HTTP port (80) is open

Skipped

This test verifies the presence of a website for the given IP or domain. Then scans port 80.
If the domain or IP is pointing to a website then port 80 must be open so that it can be accessed from a browser.
Otherwise port 80 must be closed.

0.000s

HTTPS port (443) is open

Skipped

This test verifies the presence of a website for the given IP or domain. Then scans port 443.
If the domain or IP is pointing to a website then port 443 must be open so that it can be accessed from a browser.
Otherwise port 443 must be closed.

0.000s

Web server version is hidden

Skipped

To avoid giving details to malicious people, the version of the server should not be visible.

0.000s

Web application technology is hidden

Skipped

To avoid giving details to malicious people, the technology that supports the application should not be visible.

0.000s

Cookies are secure

Skipped

Using "HttpOnly" instruction prevents someone to access to cookies via Javascript. The secure flag will allow you to prevent a cookie from ever being communicated in simple HTTP. (RFC 6265 section 8.3)

RFC

0.000s

X-XSS-Protection header is present

Skipped

The HTTP X-XSS-Protection response header is a feature of Internet Explorer, Chrome and Safari that stops pages from loading when they detect reflected cross-site scripting (XSS) attacks.

documentation

0.000s

Content Security Policy header is present

Skipped

The HTTP Content-Security-Policy response header allows web site administrators to control resources the user agent is allowed to load for a given page. With a few exceptions, policies mostly involve specifying server origins and script endpoints. This helps guard against cross-site scripting attacks (XSS).

documentation

0.000s

Content Type Options header is present

Skipped

The only defined value, "nosniff", prevents Internet Explorer from MIME-sniffing a response away from the declared content-type. This also applies to Google Chrome, when downloading extensions.

0.000s