`fourletterlearning.com`

DNSSEC	⚠️ Not signed
A	69.32.208.74^{🇺🇸 RoadRunner69.32.208.0/22 Proxy-registered route object for Cengage Learning Inc Attn Communications in CSO Mason, OH 45040}
		PTR	`cengagebrain.ae`
		PTR	`adjuncts.biz`
		PTR	`bibliobase.biz`
		PTR	`eduspace.biz`
		PTR	`facultytraining.biz`
		PTR	`geologylink.biz`
		PTR	`cengagebrain.ca`
		PTR	`weinspirefutures.ca`
		PTR	`4letterpress.com`
		PTR	`adjuncts.com`
		PTR	`americaatodds.com`
		PTR	`appliedcalc.com`
		PTR	`atomicdog.com`
		PTR	`atomicdogpublishing.com`
		PTR	`bernielearning.com`
		PTR	`berniestypingtravels.com`
		PTR	`bibliobase.com`
		PTR	`busn4me.com`
		PTR	`c21accounting.com`
		PTR	`cengagebrainasia.com`
		PTR	`cengagebraindead.com`
		PTR	`cengagebraindrain.com`
		PTR	`cengagebrainless.com`
		PTR	`cengagebrane.com`
		PTR	`cengagecareers.com`
		PTR	`cengagecustom.com`
		PTR	`cengageextracredit.com`
		PTR	`cengageheinle.com`
		PTR	`cengagehookup.com`
		PTR	`cengagelearning.com`
		PTR	`cengagemind.com`
		PTR	`cengagemindtap.com`
		PTR	`centgage.com`
		PTR	`cerlabs.com`
		PTR	`cjinaction.com`
		PTR	`collegekeyboarding.com`
		PTR	`contemporarybusiness.com`
		PTR	`contemporarymath.com`
		PTR	`copperhouse.com`
		PTR	`corpfin4me.com`
		PTR	`corpview.com`
		PTR	`course.com`
		PTR	`courseclips.com`
		PTR	`coursecontinuinged.com`
		PTR	`coursedirect.com`
		PTR	`cyberstopmedia.com`
		PTR	`delmarfacultydevelopment.com`
		PTR	`ecram.com`
		PTR	`eduspacecodes.com`
		PTR	`eltcloseup.com`
		PTR	`eltexampreparation.com`
		PTR	`eltkeynote.com`
		PTR	`eltoutcomes.com`
		PTR	`eriginality.com`
		PTR	`etexere.com`
		PTR	`fepeacock.com`
		PTR	`fin4me.com`
		PTR	`finiteandcalc.com`
		PTR	`finitemath.com`
		PTR	`finitemathtutor.com`
		PTR	`fourletterlearning.com`
		PTR	`fourletterpress.com`
		PTR	`g3oceanography.com`
		PTR	`gale-la.com`
		PTR	`galecengage-publicdomain.com`
		PTR	`galelacengage.com`
		PTR	`galeresearcher.com`
		PTR	`getstudious.com`
		PTR	`greenhaven.com`
		PTR	`gwuser.com`
		PTR	`heinlecengage.com`
		PTR	`hybridtexts.com`
		PTR	`ib4m3.com`
		PTR	`ibus4me.com`
		PTR	`infosystems-online.com`
		PTR	`internationalcengage.com`
		PTR	`investigale.com`
		PTR	`investigatingyourcareer.com`
		PTR	`itbp.com`
		PTR	`jogd.com`
		PTR	`keepingtherepublic.com`
		PTR	`keyboarding.com`
		PTR	`kidhavenpress.com`
		PTR	`learn2key.com`
		PTR	`learnby.com`
		PTR	`learnbyseries.com`
		PTR	`learnflow.com`
		PTR	`learntokey.com`
		PTR	`lifecenter.com`
		PTR	`lucentbooks.com`
		PTR	`macro4me.com`
		PTR	`meguffey.com`
		PTR	`mgmt4me.com`
		PTR	`mgmtskills4me.com`
		PTR	`milady-la.com`
		PTR	`miladybeat.com`
		PTR	`mindapps.com`
		PTR	`mktg4me.com`
		PTR	`nationalgeographiclearning.com`
		PTR	`nelsonliteracy.com`
		PTR	`nelsonvhrm.com`
		PTR	`nglelt.com`
		PTR	`nglife.com`
		PTR	`orgb4me.com`
		PTR	`planningworks.com`
		PTR	`pop4e.com`
		PTR	`pse6.com`
		PTR	`pse7.com`
		PTR	`psmedia.com`
		PTR	`reminiscences.com`
		PTR	`riverwithin.com`
		PTR	`sallyseries.com`
		PTR	`schirmercengage.com`
		PTR	`school-to-careers.com`
		PTR	`scseries.com`
		PTR	`seeingsociology.com`
		PTR	`serwayphysics.com`
		PTR	`signature-labs.com`
		PTR	`signaturelabs.com`
		PTR	`smartmove4me.com`
		PTR	`socstark10.com`
		PTR	`socstark9.com`
		PTR	`south-westernlearning.com`
		PTR	`southwesterncengage.com`
		PTR	`southwesternlearning.com`
		PTR	`speakingabout.com`
		PTR	`supplychain-online.com`
		PTR	`swbusinessprojects.com`
		PTR	`swpco.com`
		PTR	`taxforteens.com`
		PTR	`textchoice.com`
		PTR	`thegreendestination.com`
		PTR	`thomsonedu.com`
		PTR	`thomsonelearning.com`
		PTR	`thomsonlearning.com`
		PTR	`tlemea.com`
		PTR	`trophe.com`
		PTR	`trueoutcomes.com`
		PTR	`ubi-sw.com`
		PTR	`universityce.com`
		PTR	`visualizingsociology.com`
		PTR	`wadsworthcengage.com`
		PTR	`econ4me.eu`
		PTR	`mgmt4me.eu`
		PTR	`cengagebrain.hk`
		PTR	`facultytraining.info`
		PTR	`geologylink.info`
		PTR	`kidhavenpress.info`
		PTR	`lucentbooks.info`
		PTR	`nglearning.info`
		PTR	`weinspirefutures.info`
		PTR	`cengagebrain.jp`
		PTR	`cengagebrain.kr`
		PTR	`cengagebrain.lk`
		PTR	`investigale.mx`
		PTR	`4letterpress.net`
		PTR	`brookscolecengage.net`
		PTR	`busn4me.net`
		PTR	`cengage.net`
		PTR	`cengageheinle.net`
		PTR	`corpfin4me.net`
		PTR	`customcengage.net`
		PTR	`etexere.net`
		PTR	`fin4me.net`
		PTR	`fourletterlearning.net`
		PTR	`fourletterpress.net`
		PTR	`galeresearcher.net`
		PTR	`gwuser.net`
		PTR	`heinlecengage.net`
		PTR	`ib4m3.net`
		PTR	`ibus4me.net`
		PTR	`internationalcengage.net`
		PTR	`macro4me.net`
		PTR	`mgmt4me.net`
		PTR	`mgmtskills4me.net`
		PTR	`nationalgeographiclearning.net`
		PTR	`nglearning.net`
		PTR	`orgb4me.net`
		PTR	`schirmercengage.net`
		PTR	`schoolcengage.net`
		PTR	`southwesterncengage.net`
		PTR	`texere.net`
		PTR	`trueoutcomes.net`
		PTR	`wadsworthcengage.net`
		PTR	`weinspirefutures.net`
		PTR	`4letterpress.org`
		PTR	`bcom4me.org`
		PTR	`brookscolecengage.org`
		PTR	`busn4me.org`
		PTR	`cengageheinle.org`
		PTR	`corpfin4me.org`
		PTR	`customcengage.org`
		PTR	`etexere.org`
		PTR	`fin4me.org`
		PTR	`fourletterlearning.org`
		PTR	`fourletterpress.org`
		PTR	`galeresearcher.org`
		PTR	`heinlecengage.org`
		PTR	`ib4m3.org`
		PTR	`ibus4me.org`
		PTR	`internationalcengage.org`
		PTR	`macro4me.org`
		PTR	`mgmt4me.org`
		PTR	`mgmtskills4me.org`
		PTR	`ngextremeexplorer.org`
		PTR	`ngpathfinder.org`
		PTR	`ngpioneer.org`
		PTR	`ngyoungexplorer.org`
		PTR	`orgb4me.org`
		PTR	`schirmercengage.org`
		PTR	`schoolcengage.org`
		PTR	`southwesterncengage.org`
		PTR	`texere.org`
		PTR	`wadsworthcengage.org`
		PTR	`weinspirefutures.org`
		PTR	`cengagebrain.ph`
		PTR	`cengagebrain.pk`
		PTR	`cengagebrain.ru`
		PTR	`heinle-elt.ru`
		PTR	`heinle.ru`
		PTR	`cengagebrain.sg`
		PTR	`cengagebrain.tw`
		PTR	`greenhaven.us`
		PTR	`kidhavenpress.us`
		PTR	`cengage.com.ar`
		PTR	`cengagelearning.com.ar`
		PTR	`cengagebrain.com.bd`
		PTR	`cengage.com.br`
		PTR	`cengagebrain.com.br`
		PTR	`cengagelearning.com.br`
		PTR	`thomsonlearning.com.br`
		PTR	`cengage.com.co`
		PTR	`course.cengage.com`
		PTR	`coursedirect.cengage.com`
		PTR	`icpnacpt.cengage.com`
		PTR	`origin-college.cengage.com`
		PTR	`www2-i.cengage.com`
		PTR	`www2.cengage.com`
		PTR	`oc.course.com`
		PTR	`sam2007sm.course.com`
		PTR	`sam2010psm.course.com`
		PTR	`sam2010sm.course.com`
		PTR	`www.course.com`
		PTR	`pdf.educationdirect.com`
		PTR	`www.eltkeynote.com`
		PTR	`www.learnby.com`
		PTR	`cengagebrain.com.eu`
		PTR	`cengagebrain.com.hk`
		PTR	`cengagebrain.co.id`
		PTR	`cengagebrain.co.il`
		PTR	`cengagebrain.co.in`
		PTR	`cengagebrain.co.kr`
		PTR	`cengagebrain.com.lk`
		PTR	`cengagelearning.com.mx`
		PTR	`investigale.com.mx`
		PTR	`cengagebrain.com.my`
		PTR	`cengagebrain.com.ph`
		PTR	`cengagebrain.com.pk`
		PTR	`cengagebrain.com.sg`
		PTR	`cengagebrain.com.tw`
		PTR	`cengageheinle.co.uk`
		PTR	`eltexampreparation.co.uk`
		PTR	`eltkeynote.co.uk`
		PTR	`eltoutcomes.co.uk`
		PTR	`mcelt.co.uk`
		PTR	`nationalgeographiclife.co.uk`
		PTR	`psych.co.uk`
		PTR	`summertown.co.uk`
		PTR	`cengagebrain.com.vn`
		PTR	`www.support.gale.com`
NS	`ns1x.cengage.net` ⭐ ⚠️ Not in parent delegation
		A	69.32.130.251^{🇺🇸 RoadRunner69.32.130.0/23 Proxy-registered route object for Cengage Learning Inc Attn Communications in CSO Mason, OH 45040}
			PTR	`ns1x.cengage.net`
NS	`dns1.p01.nsone.net` ⚠️ Not in zone NS records
		A	2620:4d:4000:6259:7:1:0:1^{🇺🇸 NSONE2620:4d:4000::/48 2620:4D:4000::/48}
			PTR	`dns1.p01.nsone.net`
		A	198.51.44.1^{🇺🇸 NSONE198.51.44.0/24 198.51.44.0}
			PTR	`dns1.p01.nsone.net`
NS	`dns2.p01.nsone.net` ⚠️ Not in zone NS records
		A	2a00:edc0:6259:7:1::2^{🇺🇸 NSONE2a00:edc0:6259::/48 NS1-2}
			PTR	`dns2.p01.nsone.net`
		A	198.51.45.1^{🇺🇸 NSONE198.51.45.0/24 198.51.45.0}
			PTR	`dns2.p01.nsone.net`
NS	`dns3.p01.nsone.net` ⚠️ Not in zone NS records
		A	2620:4d:4000:6259:7:1:0:3^{🇺🇸 NSONE2620:4d:4000::/48 2620:4D:4000::/48}
			PTR	`dns3.p01.nsone.net`
		A	198.51.44.65^{🇺🇸 NSONE198.51.44.0/24 198.51.44.0}
			PTR	`dns3.p01.nsone.net`
NS	`dns4.p01.nsone.net` ⚠️ Not in zone NS records
		A	2a00:edc0:6259:7:1::4^{🇺🇸 NSONE2a00:edc0:6259::/48 NS1-2}
			PTR	`dns4.p01.nsone.net`
		A	198.51.45.65^{🇺🇸 NSONE198.51.45.0/24 198.51.45.0}
			PTR	`dns4.p01.nsone.net`
NS	`ns2x.cengage.net` ⚠️ Not in parent delegation
		A	69.32.224.38^{🇺🇸 RoadRunner69.32.224.0/24 Proxy-registered route object for Cengage Learning Inc Attn Communications in CSO Mason, OH 45040}
			PTR	`kyindxns4.cengage.net`
			PTR	`ns2.cengage.net`
TXT	`v=spf1 -all`
SOA	`ns1x.cengage.net`hostmaster@ohcinmason.com serial=25

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1781159698

PTR for

74.208.32.69.in-addr.arpa

Subdomains

www.fourletterlearning.com

Same first word

fourletterlearning.org

fourletterlearning.net

fourletterlearning.com

DNS History

12 records (7 active, 5 former)

○NSa1-49.akam.net2026-02-23 → 2026-05-05 · 5 obs

○ 2016-11-24 19:24:14
● 2026-02-23 10:26:54
● 2026-05-05 13:15:04
○ 2026-05-08 13:44:26
○ 2026-06-11 07:05:08

○NSa13-64.akam.net2026-02-23 → 2026-05-05 · 5 obs

○ 2016-11-24 19:24:14
● 2026-02-23 10:26:54
● 2026-05-05 13:15:04
○ 2026-05-08 13:44:26
○ 2026-06-11 07:05:08

○NSa14-65.akam.net2026-02-23 → 2026-05-05 · 5 obs

○ 2016-11-24 19:24:14
● 2026-02-23 10:26:54
● 2026-05-05 13:15:04
○ 2026-05-08 13:44:26
○ 2026-06-11 07:05:08

●NSdns1.p01.nsone.net2026-02-23 → 2026-06-11 · 3 obs

○ 2016-11-24 19:24:14
● 2026-02-23 10:26:54
● 2026-06-11 07:05:08

●NSdns2.p01.nsone.net2026-02-23 → 2026-06-11 · 3 obs

○ 2016-11-24 19:24:14
● 2026-02-23 10:26:54
● 2026-06-11 07:05:08

●NSdns3.p01.nsone.net2026-02-23 → 2026-06-11 · 3 obs

○ 2016-11-24 19:24:14
● 2026-02-23 10:26:54
● 2026-06-11 07:05:08

●NSdns4.p01.nsone.net2026-05-08 → 2026-06-11 · 3 obs

○ 2026-05-05 13:15:04
● 2026-05-08 13:44:26
● 2026-06-11 07:05:08

○NSns1.cengage.net2015-06-20 → 2016-11-24 · 4 obs

● 2015-06-20 22:44:50
● 2016-11-24 19:24:14
○ 2026-02-23 10:26:54
○ 2026-06-11 07:05:08

●NSns1x.cengage.net2026-02-23 → 2026-06-11 · 3 obs

○ 2016-11-24 19:24:14
● 2026-02-23 10:26:54
● 2026-06-11 07:05:08

○NSns2.cengage.net2015-06-20 → 2016-11-24 · 4 obs

● 2015-06-20 22:44:50
● 2016-11-24 19:24:14
○ 2026-02-23 10:26:54
○ 2026-06-11 07:05:08

●NSns2x.cengage.net2026-02-23 → 2026-06-11 · 3 obs

○ 2016-11-24 19:24:14
● 2026-02-23 10:26:54
● 2026-06-11 07:05:08

●A69.32.208.742015-06-20 → 2026-06-11 · 2 obs

● 2015-06-20 22:44:50
● 2026-06-11 07:05:08

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	k.gtld-servers.net, j.gtld-servers.net, d.gtld-servers.net, c.gtld-servers.net...	-
fourletterlearning.com	dns1.p01.nsone.net, dns2.p01.nsone.net, dns3.p01.nsone.net, dns4.p01.nsone.net	-

✅ Authoritative Response

Server:198.51.44.65

NS records: dns1.p01.nsone.net, dns2.p01.nsone.net, dns3.p01.nsone.net, dns4.p01.nsone.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for fourletterlearning.com (unsigned zone)

⏱️ Timing

Total: 794ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`69.32.208.74`
NS	2	`ns1x.cengage.net, ns2x.cengage.net`
TXT	1	`v=spf1 -all`
SOA	1	`ns1x.cengage.net hostmaster.ohcinmason.c`

Analysis

Hierarchy

The domain www.fourletterlearning.com falls under the parent fourletterlearning.com.

IP Addresses

fourletterlearning.com directs to one IP number, which is 69.32.208.74.

Among the host names that share IP numbers with fourletterlearning.com are galecengage-publicdomain.com, www2-i.cengage.com, encyclopediaanswer.com and two others.

Name Servers

DNS for fourletterlearning.com is handled by 6 name servers: ns1x.cengage.net, ns2x.cengage.net, dns1.p01.nsone.net and 3 others.

At least some of fourletterlearning.com's name servers are shared with other domains, for example tutorbase.org, littlebabym.com, gurukulevents.com and two more.

These name servers tend to co-occur with dns2.p01.nsone.net, dns3.p01.nsone.net, dns4.p01.nsone.net and 7 other name servers in the same DNS delegations.

Hosts with two IP numbers each:

dns1.p01.nsone.net has two IP addresses: 198.51.44.1 and 2620:4d:4000:6259:7:1:0:1.

dns2.p01.nsone.net has two IP addresses: 198.51.45.1 and 2a00:edc0:6259:7:1::2.

dns3.p01.nsone.net has two IP addresses: 198.51.44.65 and 2620:4d:4000:6259:7:1:0:3.

dns4.p01.nsone.net has two IP addresses: 198.51.45.65 and 2a00:edc0:6259:7:1::4.

Host names with one IP number:

ns1x.cengage.net directs to 69.32.130.251.

ns2x.cengage.net directs to 69.32.224.38.