blacksboard.com - robtex.com

blacksboard.com

DNSSEC⚠️ Not signed
A183.90.242.48🇯🇵 XSERVER-AS183.90.240.0/20 XSERVER Inc.
PTRsv2147.xserver.jp
NSns1.xserver.jp ⭐
A202.226.36.164🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.
A202.226.36.170🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.
A202.226.36.246🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.
PTRns1.xserver.jp
NSns2.xserver.jp
A35.72.43.26🇯🇵 Amazon35.72.0.0/13 EC2 NRT prefix
PTRns2.xserver.jp
NSns3.xserver.jp
A202.226.36.247🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.
PTRns3.xserver.jp
NSns4.xserver.jp
A183.90.224.226🇯🇵 XSERVER-AS183.90.224.0/20 XSERVER Inc.
A183.90.224.230🇯🇵 XSERVER-AS183.90.224.0/20 XSERVER Inc.
A202.226.39.247🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.
PTRns4.xserver.jp
NSns5.xserver.jp
A157.112.182.218🇯🇵 XSERVER-AS157.112.176.0/21 XSERVER Inc.
A157.112.182.220🇯🇵 XSERVER-AS157.112.176.0/21 XSERVER Inc.
A202.226.37.247🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.
PTRns5.xserver.jp
MXblacksboard.com ⭐
A183.90.242.48🇯🇵 XSERVER-AS183.90.240.0/20 XSERVER Inc.
PTRsv2147.xserver.jp
TXTv=spf1 +a:sv2147.xserver.jp +a:blacksboard.com +mx include:spf.sender.xserver...
SOAns1.xserver.jproot@sv0.xserver.jp serial=0

com

DNSSEC🔒 Signed (DS record present)
NSa.gtld-servers.net ⭐
NSb.gtld-servers.net
NSc.gtld-servers.net
NSd.gtld-servers.net
NSe.gtld-servers.net
NSf.gtld-servers.net
NSg.gtld-servers.net
NSh.gtld-servers.net
NSi.gtld-servers.net
NSj.gtld-servers.net
NSk.gtld-servers.net
NSl.gtld-servers.net
NSm.gtld-servers.net
SOAa.gtld-servers.netnstld@verisign-grs.com serial=1774711657

MX for

blacksboard.com

Same first word

blacksboard.com

Similar names

blackboards.com
blackboards.it
blackboards.org
blackboards.com.au
blackboards.de
blackboards.ru
blackboards.ir
blackboards.org.uk
blackboards.ca

DNS History

13 records (7 active, 6 former)

20162017201820192020202120222023202420252026NSns1.xserver.jpns2.xserver.jpns3.xserver.jpns4.xserver.jpns5.xserver.jpdns1.name-services.comdns2.name-services.comdns3.name-services.comdns4.name-services.comdns5.name-services.comMXblacksboard.comA183.90.242.48203.189.105.192
○NSdns1.name-services.com2015-05-28 → 2017-02-15 · 4 obs
● 2015-05-28 13:19:54
● 2017-02-15 13:45:44
○ 2019-03-09 19:00:18
○ 2026-03-28 15:34:44
○NSdns2.name-services.com2015-05-28 → 2017-02-15 · 4 obs
● 2015-05-28 13:19:54
● 2017-02-15 13:45:44
○ 2019-03-09 19:00:18
○ 2026-03-28 15:34:44
○NSdns3.name-services.com2015-05-28 → 2017-02-15 · 4 obs
● 2015-05-28 13:19:54
● 2017-02-15 13:45:44
○ 2019-03-09 19:00:18
○ 2026-03-28 15:34:44
○NSdns4.name-services.com2015-05-28 → 2017-02-15 · 4 obs
● 2015-05-28 13:19:54
● 2017-02-15 13:45:44
○ 2019-03-09 19:00:18
○ 2026-03-28 15:34:44
○NSdns5.name-services.com2015-05-28 → 2017-02-15 · 4 obs
● 2015-05-28 13:19:54
● 2017-02-15 13:45:44
○ 2019-03-09 19:00:18
○ 2026-03-28 15:34:44
●NSns1.xserver.jp2019-03-09 → 2026-03-28 · 3 obs
○ 2017-02-15 13:45:44
● 2019-03-09 19:00:18
● 2026-03-28 15:34:44
●NSns2.xserver.jp2019-03-09 → 2026-03-28 · 3 obs
○ 2017-02-15 13:45:44
● 2019-03-09 19:00:18
● 2026-03-28 15:34:44
●NSns3.xserver.jp2019-03-09 → 2026-03-28 · 3 obs
○ 2017-02-15 13:45:44
● 2019-03-09 19:00:18
● 2026-03-28 15:34:44
●NSns4.xserver.jp2019-03-09 → 2026-03-28 · 3 obs
○ 2017-02-15 13:45:44
● 2019-03-09 19:00:18
● 2026-03-28 15:34:44
●NSns5.xserver.jp2019-03-09 → 2026-03-28 · 3 obs
○ 2017-02-15 13:45:44
● 2019-03-09 19:00:18
● 2026-03-28 15:34:44
●MXblacksboard.com2019-03-09 → 2026-03-28 · 2 obs
● 2019-03-09 19:00:18
● 2026-03-28 15:34:44
●A183.90.242.482019-03-09 → 2026-03-28 · 3 obs
○ 2017-02-15 13:45:44
● 2019-03-09 19:00:18
● 2026-03-28 15:34:44
○A203.189.105.1922015-05-28 → 2017-02-15 · 4 obs
● 2015-05-28 13:19:54
● 2017-02-15 13:45:44
○ 2019-03-09 19:00:18
○ 2026-03-28 15:34:44

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coma.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...-
blacksboard.comns1.xserver.jp, ns2.xserver.jp, ns3.xserver.jp, ns4.xserver.jp...-

✅ Authoritative Response

Server:202.226.37.247

NS records: ns1.xserver.jp, ns2.xserver.jp, ns3.xserver.jp, ns4.xserver.jp, ns5.xserver.jp

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for blacksboard.com (unsigned zone)

⏱️ Timing

Total: 3101ms | Queries: -

📄 Records

TypeCountSample Data
A1183.90.242.48
NS5ns3.xserver.jp, ns2.xserver.jp...
MX1blacksboard.com (pri: 0)
TXT1v=spf1 +a:sv2147.xserver.jp +a:blacksboa
SOA1ns1.xserver.jp root.sv0.xserver.jp

Analysis

Mail Server Role

blacksboard.com serves as a mail server for blacksboard.com.

IP Addresses

blacksboard.com points to a single IP: 183.90.242.48.

Other host names, for instance www.liike.jp, nanami-k.net, menu-signs.info, prepress-aika.com and kyoto-nagata.com share IP numbers with blacksboard.com.

Name Servers

blacksboard.com is delegated to five name servers: ns1.xserver.jp, ns2.xserver.jp, ns3.xserver.jp, ns4.xserver.jp and ns5.xserver.jp.

blacksboard.com partially shares name servers with other domains; examples include seventech.co.jp, dairiten-system.com, hitoria.com, yamauchiya.info and kimono-story.com.

Host names with three IP numbers:

ns1.xserver.jp points to: 202.226.36.164, 202.226.36.170 and 202.226.36.246

ns4.xserver.jp points to: 183.90.224.226, 183.90.224.230 and 202.226.39.247

ns5.xserver.jp points to: 157.112.182.218, 157.112.182.220 and 202.226.37.247

Host names with one IP number:

ns2.xserver.jp points to: 35.72.43.26

ns3.xserver.jp points to: 202.226.36.247

Mail Servers

blacksboard.com is handled by a single mail server, blacksboard.com.

blacksboard.com points to a single IP: 183.90.242.48.