21stcenturysoftware.com - robtex.com

21stcenturysoftware.com

DNSSEC⚠️ Not signed
A157.245.137.109🇺🇸 DIGITALOCEAN157.245.128.0/20 DigitalOcean
NSns-2035.awsdns-62.co.uk ⭐ ⚠️ Not in zone NS records
A2600:9000:5307:f300::1🇺🇸 Amazon2600:9000:5307::/48 - CloudFront
PTRns-2035.awsdns-62.co.uk
A205.251.199.243🇺🇸 Amazon205.251.199.0/24 prefix
PTRns-2035.awsdns-62.co.uk
NSns-1302.awsdns-34.org ⚠️ Not in zone NS records
A2600:9000:5305:1600::1🇺🇸 Amazon2600:9000:5305::/48 - CloudFront
PTRns-1302.awsdns-34.org
A205.251.197.22🇺🇸 Amazon205.251.197.0/24 prefix
PTRns-1302.awsdns-34.org
NSns-233.awsdns-29.com ⚠️ Not in zone NS records
A2600:9000:5300:e900::1🇺🇸 Amazon2600:9000:5300::/48 - CloudFront
PTRns-233.awsdns-29.com
A205.251.192.233🇺🇸 Amazon205.251.192.0/24 prefix
PTRns-233.awsdns-29.com
NSns-545.awsdns-04.net ⚠️ Not in zone NS records
A2600:9000:5302:2100::1🇺🇸 Amazon2600:9000:5302::/48 - CloudFront
PTRns-545.awsdns-04.net
A205.251.194.33🇺🇸 Amazon205.251.194.0/24 prefix
PTRns-545.awsdns-04.net
NSns2.bluehost.com ⚠️ Not in zone NS records
A162.159.25.175Cloudflare162.159.25.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRns2.bluehost.com
MX21stcenturysoftware-com.mail.protection.outlook.com ⭐
A52.101.11.9🇺🇸 Microsoft52.96.0.0/12 MICROSOFT
PTRmail-sn1pr02cu00101.inbound.protection.outlook.com
A52.101.41.24🇺🇸 Microsoft52.96.0.0/12 MICROSOFT
PTRmail-sj0pr03cu01600.inbound.protection.outlook.com
A52.101.41.56🇺🇸 Microsoft52.96.0.0/12 MICROSOFT
PTRmail-sj0pr21cu00100.inbound.protection.outlook.com
A52.101.42.14🇺🇸 Microsoft52.96.0.0/12 MICROSOFT
PTRmail-mw2pr04cu00106.inbound.protection.outlook.com
SOAns-2035.awsdns-62.co.ukawsdns-hostmaster@amazon.com serial=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=1771291435

Subdomains

www.21stcenturysoftware.com

Same first word

21stcenturysoftware.com

DNS History

16 records (7 active, 9 former)

20162017201820192020202120222023202420252026NSns-1302.awsdns-34.orgns-2035.awsdns-62.co.ukns-233.awsdns-29.comns-545.awsdns-04.netns2.bluehost.comns1.bluehost.comns57.1and1.comns58.1and1.comMX21stcenturysoftware-com.mail.protection.outlook.commx00.1and1.commx01.1and1.comA157.245.137.109162.241.16.14198.251.66.238216.250.120.7374.220.199.6
●NSns-1302.awsdns-34.org2026-03-14 → 2026-03-23 · 3 obs
○ 2019-12-31 09:11:28
● 2026-03-14 08:03:26
● 2026-03-23 05:27:30
●NSns-2035.awsdns-62.co.uk2026-03-14 → 2026-03-23 · 3 obs
○ 2019-12-31 09:11:28
● 2026-03-14 08:03:26
● 2026-03-23 05:27:30
●NSns-233.awsdns-29.com2026-03-14 → 2026-03-23 · 3 obs
○ 2019-12-31 09:11:28
● 2026-03-14 08:03:26
● 2026-03-23 05:27:30
●NSns-545.awsdns-04.net2026-03-14 → 2026-03-23 · 3 obs
○ 2019-12-31 09:11:28
● 2026-03-14 08:03:26
● 2026-03-23 05:27:30
○NSns1.bluehost.com2019-12-31 → 2019-12-31 · 4 obs
○ 2017-03-24 08:25:14
● 2019-12-31 09:11:28
○ 2026-03-14 08:03:26
○ 2026-03-23 05:27:30
●NSns2.bluehost.com2019-12-31 → 2026-03-23 · 3 obs
○ 2017-03-24 08:25:14
● 2019-12-31 09:11:28
● 2026-03-23 05:27:30
○NSns57.1and1.com2015-08-19 → 2017-03-24 · 4 obs
● 2015-08-19 02:49:56
● 2017-03-24 08:25:14
○ 2019-12-31 09:11:28
○ 2026-03-23 05:27:30
○NSns58.1and1.com2015-08-19 → 2017-03-24 · 4 obs
● 2015-08-19 02:49:56
● 2017-03-24 08:25:14
○ 2019-12-31 09:11:28
○ 2026-03-23 05:27:30
●MX21stcenturysoftware-com.mail.protection.outlook.com2019-12-31 → 2026-03-23 · 6 obs
○ 2017-03-24 08:25:14
● 2019-12-31 09:11:28
● 2026-03-14 08:03:26
○ 2026-03-14 08:33:56
● 2026-03-21 07:59:20
● 2026-03-23 05:27:30
○MXmx00.1and1.com2015-08-19 → 2017-03-24 · 4 obs
● 2015-08-19 02:49:56
● 2017-03-24 08:25:14
○ 2019-12-31 09:11:28
○ 2026-03-23 05:27:30
○MXmx01.1and1.com2015-08-19 → 2017-03-24 · 4 obs
● 2015-08-19 02:49:56
● 2017-03-24 08:25:14
○ 2019-12-31 09:11:28
○ 2026-03-23 05:27:30
●A157.245.137.1092026-03-14 → 2026-03-23 · 5 obs
○ 2026-03-14 08:03:26
● 2026-03-14 08:33:56
○ 2026-03-21 07:59:20
● 2026-03-22 17:51:34
● 2026-03-23 05:27:30
○A162.241.16.142019-12-31 → 2019-12-31 · 4 obs
○ 2017-03-24 08:25:14
● 2019-12-31 09:11:28
○ 2026-03-14 08:03:26
○ 2026-03-23 05:27:30
○A198.251.66.2382015-08-19 → 2016-03-23 · 4 obs
● 2015-08-19 02:49:56
● 2016-03-23 13:26:02
○ 2016-07-16 23:34:42
○ 2026-03-23 05:27:30
○A216.250.120.732016-07-16 → 2017-03-24 · 5 obs
○ 2016-03-23 13:26:02
● 2016-07-16 23:34:42
● 2017-03-24 08:25:14
○ 2019-12-31 09:11:28
○ 2026-03-23 05:27:30
○A74.220.199.62026-03-14 → 2026-03-21 · 6 obs
○ 2019-12-31 09:11:28
● 2026-03-14 08:03:26
○ 2026-03-14 08:33:56
● 2026-03-21 07:59:20
○ 2026-03-22 17:51:34
○ 2026-03-23 05:27:30

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
comd.gtld-servers.net, i.gtld-servers.net, g.gtld-servers.net, e.gtld-servers.net...-
21stcenturysoftware.comns2.bluehost.com, ns-233.awsdns-29.com, ns-545.awsdns-04.net, ns-1302.awsdns-34.org...2 records

✅ Authoritative Response

Server:205.251.197.22

NS records: ns2.bluehost.com, ns-233.awsdns-29.com, ns-545.awsdns-04.net, ns-1302.awsdns-34.org, ns-2035.awsdns-62.co.uk

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 21stcenturysoftware.com (unsigned zone)

⏱️ Timing

Total: 1492ms | Queries: -

📄 Records

TypeCountSample Data
A1157.245.137.109
NS4ns-1302.awsdns-34.org, ns-2035.awsdns-62.co.uk...
MX121stcenturysoftware-com.mail.protection.
SOA1ns-2035.awsdns-62.co.uk awsdns-hostmaste

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns2.bluehost.com, ns-233.awsdns-29.com)

Analysis

Hierarchy

21stcenturysoftware.com is the parent of www.21stcenturysoftware.com.

IP Addresses

21stcenturysoftware.com points to a single IP number: 157.245.137.109.

Other host names, for instance www.21stcenturysoftware.com, share IP numbers with 21stcenturysoftware.com.

Name Servers

21stcenturysoftware.com is delegated to five name servers: ns-233.awsdns-29.com, ns2.bluehost.com, ns-545.awsdns-04.net, ns-1302.awsdns-34.org and ns-2035.awsdns-62.co.uk.

21stcenturysoftware.com at least partially shares name servers with other domains, for instance adagiocorp.net, thewilltolive.co.uk, cloudtag.co, crossofglory.org and marketingsupportnetwork.com.

These name servers are commonly used with ns1.bluehost.com, ns-684.awsdns-21.net, ns-1069.awsdns-05.org and ns-1941.awsdns-50.co.uk.

Host names with two IP numbers:

ns-233.awsdns-29.com resolves to 2600:9000:5300:e900::1 and 205.251.192.233.

ns-545.awsdns-04.net resolves to 2600:9000:5302:2100::1 and 205.251.194.33.

ns-1302.awsdns-34.org resolves to 2600:9000:5305:1600::1 and 205.251.197.22.

ns-2035.awsdns-62.co.uk resolves to 2600:9000:5307:f300::1 and 205.251.199.243.

Host names with a single IP:

ns2.bluehost.com resolves to 162.159.25.175.

Mail Servers

21stcenturysoftware.com is handled by a single mail server, 21stcenturysoftware-com.mail.protection.outlook.com.

Host name 21stcenturysoftware-com.mail.protection.outlook.com resolves to four IP numbers: 52.101.11.9, 52.101.41.24, 52.101.41.56 and 52.101.42.14.