northcourse.com - robtex.com

northcourse.com

DNSSEC⚠️ Not signed
A174.143.45.139🇺🇸 RACKSPACE-DFW174.143.0.0/16 Rackspace Managed Hosting, 9725 Datapoint DR, Suite 100, San Antonio, TX 78229
NSns9.customer.level3.net.northcourse.com ⭐
NSb23.ns.els-gms.att.net ⚠️ Not in parent delegation
A2001:1890:1ff:3::23🇺🇸 AS70182001:1890::/29 AT&T Enterprises, LLC
A199.191.128.105🇺🇸 AS7018199.191.128.0/23
PTRb23.ns.els-gms.att.net
NSb24.ns.els-gms.att.net ⚠️ Not in parent delegation
A2001:1890:1ff:3::24🇺🇸 AS70182001:1890::/29 AT&T Enterprises, LLC
A199.191.128.106🇺🇸 AS7018199.191.128.0/23
PTRb24.ns.els-gms.att.net
NSdbru.br.ns.els-gms.att.net ⚠️ Not in zone NS records
A2001:1890:1ff:9f0:68:94:156:134🇺🇸 AS70182001:1890::/29 AT&T Enterprises, LLC
PTRdbru.br.ns.els-gms.att.net
A68.94.156.134🇺🇸 AS701868.88.0.0/13 ARIN Allocation SBC Internet Services
PTRdbru.br.ns.els-gms.att.net
NSdmtu.mt.ns.els-gms.att.net ⚠️ Not in zone NS records
A2001:1890:1ff:9f1:99:99:99:134🇺🇸 AS70182001:1890::/29 AT&T Enterprises, LLC
PTRdmtu.mt.ns.els-gms.att.net
A99.99.99.134🇺🇸 AS701899.96.0.0/13 AT&T Enterprises, LLC
PTRdmtu.mt.ns.els-gms.att.net
NSm23.ns.els-gms.att.net ⚠️ Not in parent delegation
A2001:1890:1ff:10::23🇺🇸 AS70182001:1890::/29 AT&T Enterprises, LLC
A12.127.16.69🇺🇸 AS701812.112.0.0/12
PTRm23.ns.els-gms.att.net
NSm24.ns.els-gms.att.net ⚠️ Not in parent delegation
A2001:1890:1ff:10::24🇺🇸 AS70182001:1890::/29 AT&T Enterprises, LLC
A12.127.16.70🇺🇸 AS701812.112.0.0/12
PTRm24.ns.els-gms.att.net
NSns3.level3.net
A216.136.95.12🇺🇸 AS3549216.136.0.0/17
PTRns3.level3.net
NSns4.level3.net
A64.132.94.251🇺🇸 AS354964.132.0.0/16
PTRns4.level3.net
MXnorthcourse-com.mail.protection.outlook.com ⭐
A2a01:111:f403:c902::2🇺🇸 Microsoft2a01:111:f000::/36
PTRmail-sj0pr03cu01602.inbound.protection.outlook.com
A2a01:111:f403:c902::3🇺🇸 Microsoft2a01:111:f000::/36
PTRmail-sj0pr03cu01703.inbound.protection.outlook.com
A2a01:111:f403:c922::2🇺🇸 Microsoft2a01:111:f000::/36
PTRmail-bl0pr02cu00702.inbound.protection.outlook.com
A2a01:111:f403:f90a::🇺🇸 Microsoft2a01:111:f000::/36
PTRmail-bn6pr02cu00300.inbound.protection.outlook.com
A52.101.10.1🇺🇸 Microsoft52.96.0.0/12 MICROSOFT
PTRmail-bn6pr02cu00301.inbound.protection.outlook.com
A52.101.10.6🇺🇸 Microsoft52.96.0.0/12 MICROSOFT
PTRmail-bn1pr21cu00106.inbound.protection.outlook.com
A52.101.11.10🇺🇸 Microsoft52.96.0.0/12 MICROSOFT
PTRmail-sa9pr03cu00202.inbound.protection.outlook.com
A52.101.50.7🇺🇸 Microsoft52.96.0.0/12 MICROSOFT
PTRmail-co1pr21cu00207.inbound.protection.outlook.com
TXTMS=ms90061930
TXTv=spf1 ip4:208.86.201.115 ip4:208.84.65.71 include:spf-00128607.pphosted.com ...
SOAns9.customer.level3.net.northcourse.compostmaster@ns3.level3.net 2021-10-05 #1

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=1774566047
WOT: SAFE (62/100)

Same first word

northcourse.com

Similar names

northsource.com.cn
southernroc.com
northsource.net
southcorner.it
sourcenorth.com

DNS History

28 records (11 active, 17 former)

200920112013201520172019202120232025NSb23.ns.els-gms.att.netb24.ns.els-gms.att.netdbru.br.ns.els-gms.att.netdmtu.mt.ns.els-gms.att.netm23.ns.els-gms.att.netm24.ns.els-gms.att.netns3.level3.netns4.level3.netns9.customer.level3.net.northcourse.comcbru.br.ns.els-gms.att.netcmtu.mt.ns.els-gms.att.netdnsauth1.sys.gtei.netdnsauth2.sys.gtei.netdnsmgr3.level3.netns1.dtc.cendant.comns19.customer.level3.netns2.dtc.cendant.comns24.customer.level3.netns9.customer.level3.netMXnorthcourse-com.mail.protection.outlook.commxa-00128607.gslb.pphosted.commxb-00128607.gslb.pphosted.comrci.com.s8a1.psmtp.comrci.com.s8a2.psmtp.comrci.com.s8b1.psmtp.comrci.com.s8b2.psmtp.comA174.143.45.13964.40.104.76
●NSb23.ns.els-gms.att.net2026-03-26 → 2026-03-26 · 2 obs
○ 2017-11-19 06:04:32
● 2026-03-26 23:26:46
●NSb24.ns.els-gms.att.net2026-03-26 → 2026-03-26 · 2 obs
○ 2017-11-19 06:04:32
● 2026-03-26 23:26:46
○NScbru.br.ns.els-gms.att.net2015-08-23 → 2017-11-19 · 4 obs
○ 2008-02-01 21:16:24
● 2015-08-23 07:51:40
● 2017-11-19 06:04:32
○ 2026-03-26 23:26:46
○NScmtu.mt.ns.els-gms.att.net2015-08-23 → 2017-11-19 · 4 obs
○ 2008-02-01 21:16:24
● 2015-08-23 07:51:40
● 2017-11-19 06:04:32
○ 2026-03-26 23:26:46
●NSdbru.br.ns.els-gms.att.net2015-08-23 → 2026-03-26 · 3 obs
○ 2008-02-01 21:16:24
● 2015-08-23 07:51:40
● 2026-03-26 23:26:46
●NSdmtu.mt.ns.els-gms.att.net2015-08-23 → 2026-03-26 · 3 obs
○ 2008-02-01 21:16:24
● 2015-08-23 07:51:40
● 2026-03-26 23:26:46
○NSdnsauth1.sys.gtei.net2008-02-01 → 2008-02-01 · 3 obs
● 2008-02-01 21:16:24
○ 2015-08-23 07:51:40
○ 2026-03-26 23:26:46
○NSdnsauth2.sys.gtei.net2008-02-01 → 2008-02-01 · 3 obs
● 2008-02-01 21:16:24
○ 2015-08-23 07:51:40
○ 2026-03-26 23:26:46
○NSdnsmgr3.level3.net2015-08-23 → 2017-11-19 · 4 obs
○ 2008-02-01 21:16:24
● 2015-08-23 07:51:40
● 2017-11-19 06:04:32
○ 2026-03-26 23:26:46
●NSm23.ns.els-gms.att.net2026-03-26 → 2026-03-26 · 2 obs
○ 2017-11-19 06:04:32
● 2026-03-26 23:26:46
●NSm24.ns.els-gms.att.net2026-03-26 → 2026-03-26 · 2 obs
○ 2017-11-19 06:04:32
● 2026-03-26 23:26:46
○NSns1.dtc.cendant.com2008-02-01 → 2008-02-01 · 3 obs
● 2008-02-01 21:16:24
○ 2015-08-23 07:51:40
○ 2026-03-26 23:26:46
○NSns19.customer.level3.net2015-08-23 → 2017-11-19 · 4 obs
○ 2008-02-01 21:16:24
● 2015-08-23 07:51:40
● 2017-11-19 06:04:32
○ 2026-03-26 23:26:46
○NSns2.dtc.cendant.com2008-02-01 → 2008-02-01 · 3 obs
● 2008-02-01 21:16:24
○ 2015-08-23 07:51:40
○ 2026-03-26 23:26:46
○NSns24.customer.level3.net2015-08-23 → 2017-11-19 · 4 obs
○ 2008-02-01 21:16:24
● 2015-08-23 07:51:40
● 2017-11-19 06:04:32
○ 2026-03-26 23:26:46
●NSns3.level3.net2026-03-26 → 2026-03-26 · 2 obs
○ 2017-11-19 06:04:32
● 2026-03-26 23:26:46
●NSns4.level3.net2026-03-26 → 2026-03-26 · 2 obs
○ 2017-11-19 06:04:32
● 2026-03-26 23:26:46
○NSns9.customer.level3.net2015-08-23 → 2017-11-19 · 4 obs
○ 2008-02-01 21:16:24
● 2015-08-23 07:51:40
● 2017-11-19 06:04:32
○ 2026-03-26 23:26:46
●NSns9.customer.level3.net.northcourse.com2026-03-26 → 2026-03-26 · 2 obs
○ 2017-11-19 06:04:32
● 2026-03-26 23:26:46
○MXmxa-00128607.gslb.pphosted.com2015-08-23 → 2017-11-19 · 4 obs
○ 2008-02-01 21:16:24
● 2015-08-23 07:51:40
● 2017-11-19 06:04:32
○ 2026-03-26 23:26:46
○MXmxb-00128607.gslb.pphosted.com2015-08-23 → 2017-11-19 · 4 obs
○ 2008-02-01 21:16:24
● 2015-08-23 07:51:40
● 2017-11-19 06:04:32
○ 2026-03-26 23:26:46
●MXnorthcourse-com.mail.protection.outlook.com2026-03-26 → 2026-03-26 · 2 obs
○ 2017-11-19 06:04:32
● 2026-03-26 23:26:46
○MXrci.com.s8a1.psmtp.com2008-02-01 → 2008-02-01 · 3 obs
● 2008-02-01 21:16:24
○ 2015-08-23 07:51:40
○ 2026-03-26 23:26:46
○MXrci.com.s8a2.psmtp.com2008-02-01 → 2008-02-01 · 3 obs
● 2008-02-01 21:16:24
○ 2015-08-23 07:51:40
○ 2026-03-26 23:26:46
○MXrci.com.s8b1.psmtp.com2008-02-01 → 2008-02-01 · 3 obs
● 2008-02-01 21:16:24
○ 2015-08-23 07:51:40
○ 2026-03-26 23:26:46
○MXrci.com.s8b2.psmtp.com2008-02-01 → 2008-02-01 · 3 obs
● 2008-02-01 21:16:24
○ 2015-08-23 07:51:40
○ 2026-03-26 23:26:46
●A174.143.45.1392015-08-23 → 2026-03-26 · 3 obs
○ 2008-02-01 21:16:24
● 2015-08-23 07:51:40
● 2026-03-26 23:26:46
○A64.40.104.762008-02-01 → 2008-02-01 · 3 obs
● 2008-02-01 21:16:24
○ 2015-08-23 07:51:40
○ 2026-03-26 23:26:46

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
comd.gtld-servers.net, k.gtld-servers.net, l.gtld-servers.net, e.gtld-servers.net...-
northcourse.comdbru.br.ns.els-gms.att.net, dmtu.mt.ns.els-gms.att.net, ns3.level3.net, ns4.level3.net-

✅ Authoritative Response

Server:64.132.94.251

NS records: dbru.br.ns.els-gms.att.net, dmtu.mt.ns.els-gms.att.net, ns3.level3.net, ns4.level3.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for northcourse.com (unsigned zone)

⏱️ Timing

Total: 498ms | Queries: -

📄 Records

TypeCountSample Data
A1174.143.45.139
NS6m23.ns.els-gms.att.net, b23.ns.els-gms.att.net...
MX1northcourse-com.mail.protection.outlook.
TXT2MS=ms90061930, v=spf1 ip4:208.86.201.115 ip4:208.84.65.
SOA1ns9.customer.level3.net.northcourse.com

Analysis

IP Addresses

northcourse.com points to a single IP address: 174.143.45.139.

Other host names such as simworld.com, apollocollege.edu, proferma.net, meijeronlinedeals.com and cc.edu share IP numbers with northcourse.com.

Name Servers

northcourse.com is delegated to nine name servers: ns3.level3.net, ns4.level3.net, b23.ns.els-gms.att.net, b24.ns.els-gms.att.net, m23.ns.els-gms.att.net, m24.ns.els-gms.att.net, ns9.customer.level3.net.northcourse.com, dbru.br.ns.els-gms.att.net and dmtu.mt.ns.els-gms.att.net.

At least part of the name servers for northcourse.com are shared with other domains, for instance 242.63.in-addr.arpa, 102.84.216.in-addr.arpa, geicoprivileges.com, newmarkpm.net and 63.192.66.in-addr.arpa.

these name servers are commonly used with the name servers ns2.vwr.com, ns10.vwr.com, ns5.vwr.com, cmtu.mt.ns.els-gms.att.net, ns1.vwr.com, cbru.br.ns.els-gms.att.net, ns18.vwr.com, ns15.vwr.com, ns.jms.entergy.com and ns.roc.entergy.com.

Host names with two IP numbers:

b23.ns.els-gms.att.net points to 2001:1890:1ff:3::23 and 199.191.128.105; b24.ns.els-gms.att.net points to 2001:1890:1ff:3::24 and 199.191.128.106; m23.ns.els-gms.att.net points to 2001:1890:1ff:10::23 and 12.127.16.69; m24.ns.els-gms.att.net points to 2001:1890:1ff:10::24 and 12.127.16.70; dbru.br.ns.els-gms.att.net points to 2001:1890:1ff:9f0:68:94:156:134 and 68.94.156.134; dmtu.mt.ns.els-gms.att.net points to 2001:1890:1ff:9f1:99:99:99:134 and 99.99.99.134.

Host names with one IP number:

ns3.level3.net points to 216.136.95.12; ns4.level3.net points to 64.132.94.251.

Mail Servers

The mail server for northcourse.com is northcourse-com.mail.protection.outlook.com.

northcourse-com.mail.protection.outlook.com points to eight IP numbers: 2a01:111:f403:c902::2, 2a01:111:f403:c902::3, 2a01:111:f403:c922::2, 2a01:111:f403:f90a::, 52.101.10.1, 52.101.10.6, 52.101.11.10 and 52.101.50.7.