upfrontbooks.com - robtex.com

upfrontbooks.com

DNSSEC⚠️ Not signed
A13.226.238.15🇺🇸 Amazon13.226.232.0/21 - Cloudfront
PTRserver-13-226-238-15.iad61.r.cloudfront.net
A13.226.238.60🇺🇸 Amazon13.226.232.0/21 - Cloudfront
A13.226.238.63🇺🇸 Amazon13.226.232.0/21 - Cloudfront
A13.226.238.110🇺🇸 Amazon13.226.232.0/21 - Cloudfront
NSns-1521.awsdns-62.org ⭐
A2600:9000:5305:f100::1🇺🇸 Amazon2600:9000:5305::/48 - CloudFront
PTRns-1521.awsdns-62.org
A205.251.197.241🇺🇸 Amazon205.251.197.0/24 prefix
PTRns-1521.awsdns-62.org
NSns-1872.awsdns-42.co.uk
A2600:9000:5307:5000::1🇺🇸 Amazon2600:9000:5307::/48 - CloudFront
PTRns-1872.awsdns-42.co.uk
A205.251.199.80🇺🇸 Amazon205.251.199.0/24 prefix
PTRns-1872.awsdns-42.co.uk
NSns-436.awsdns-54.com
A2600:9000:5301:b400::1🇺🇸 Amazon2600:9000:5301::/48 - CloudFront
PTRns-436.awsdns-54.com
A205.251.193.180🇺🇸 Amazon205.251.193.0/24 prefix
PTRns-436.awsdns-54.com
NSns-976.awsdns-58.net
A2600:9000:5303:d000::1🇺🇸 Amazon2600:9000:5303::/48 - CloudFront
PTRns-976.awsdns-58.net
A205.251.195.208🇺🇸 Amazon205.251.195.0/24 prefix
PTRns-976.awsdns-58.net
MXusb-smtp-inbound-1.mimecast.com ⭐
A170.10.150.242🇺🇸 Mimecast-NA170.10.150.0/24 Mimecast NA
PTRusb-smtp-delivery-2.mimecast.com
A170.10.152.242🇺🇸 Mimecast-NA170.10.152.0/24 Mimecast NA
PTRusb-smtp-delivery-2.mimecast.com
MXusb-smtp-inbound-2.mimecast.com(20)
A170.10.150.242🇺🇸 Mimecast-NA170.10.150.0/24 Mimecast NA
PTRusb-smtp-delivery-2.mimecast.com
A170.10.152.242🇺🇸 Mimecast-NA170.10.152.0/24 Mimecast NA
PTRusb-smtp-delivery-2.mimecast.com
TXTMS=ms47732836
TXTppe-eebf919500a439099a79b12659526048bea8264c
TXTv=spf1 include:spf.protection.outlook.com a:mail.rbmediaglobal.com include:us...
SOAns-1521.awsdns-62.orgawsdns-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=1774413007

Same first word

upfrontbooks.com

DNS History

35 records (10 active, 25 former)

20162017201820192020202120222023202420252026NSns-1521.awsdns-62.orgns-1872.awsdns-42.co.ukns-436.awsdns-54.comns-976.awsdns-58.netns13.domaincontrol.comns14.domaincontrol.comns33.domaincontrol.comns34.domaincontrol.comMXusb-smtp-inbound-1.mimecast.comusb-smtp-inbound-2.mimecast.commailstore1.secureserver.netsmtp.secureserver.netupfrontbooks-com.mail.protection.outlook.comA13.226.238.11013.226.238.1513.226.238.6013.226.238.6313.33.252.1213.33.252.5213.33.252.5613.33.252.6718.172.153.12018.172.153.3918.172.153.4318.172.153.7618.65.3.1018.65.3.12118.65.3.1418.65.3.64184.168.221.13198.71.233.1353.174.113.133.174.113.233.174.113.523.174.113.9
●NSns-1521.awsdns-62.org2026-02-23 → 2026-03-25 · 3 obs
○ 2018-06-19 07:30:52
● 2026-02-23 12:17:30
● 2026-03-25 04:36:38
●NSns-1872.awsdns-42.co.uk2026-02-23 → 2026-03-25 · 3 obs
○ 2018-06-19 07:30:52
● 2026-02-23 12:17:30
● 2026-03-25 04:36:38
●NSns-436.awsdns-54.com2026-02-23 → 2026-03-25 · 3 obs
○ 2018-06-19 07:30:52
● 2026-02-23 12:17:30
● 2026-03-25 04:36:38
●NSns-976.awsdns-58.net2026-02-23 → 2026-03-25 · 3 obs
○ 2018-06-19 07:30:52
● 2026-02-23 12:17:30
● 2026-03-25 04:36:38
○NSns13.domaincontrol.com2018-06-19 → 2018-06-19 · 4 obs
○ 2016-03-01 08:36:30
● 2018-06-19 07:30:52
○ 2026-02-23 12:17:30
○ 2026-03-25 04:36:38
○NSns14.domaincontrol.com2018-06-19 → 2018-06-19 · 4 obs
○ 2016-03-01 08:36:30
● 2018-06-19 07:30:52
○ 2026-02-23 12:17:30
○ 2026-03-25 04:36:38
○NSns33.domaincontrol.com2015-07-20 → 2015-11-20 · 4 obs
● 2015-07-20 13:42:56
● 2015-11-20 08:20:06
○ 2016-03-01 08:36:30
○ 2026-03-25 04:36:38
○NSns34.domaincontrol.com2015-07-20 → 2015-11-20 · 4 obs
● 2015-07-20 13:42:56
● 2015-11-20 08:20:06
○ 2016-03-01 08:36:30
○ 2026-03-25 04:36:38
○MXmailstore1.secureserver.net2015-07-20 → 2015-11-20 · 4 obs
● 2015-07-20 13:42:56
● 2015-11-20 08:20:06
○ 2016-03-01 08:36:30
○ 2026-03-25 04:36:38
○MXsmtp.secureserver.net2015-07-20 → 2015-11-20 · 4 obs
● 2015-07-20 13:42:56
● 2015-11-20 08:20:06
○ 2016-03-01 08:36:30
○ 2026-03-25 04:36:38
○MXupfrontbooks-com.mail.protection.outlook.com2018-06-19 → 2018-06-19 · 4 obs
○ 2016-03-01 08:36:30
● 2018-06-19 07:30:52
○ 2026-02-23 12:17:30
○ 2026-03-25 04:36:38
●MXusb-smtp-inbound-1.mimecast.com2026-02-23 → 2026-03-25 · 3 obs
○ 2018-06-19 07:30:52
● 2026-02-23 12:17:30
● 2026-03-25 04:36:38
●MXusb-smtp-inbound-2.mimecast.com2026-02-23 → 2026-03-25 · 3 obs
○ 2018-06-19 07:30:52
● 2026-02-23 12:17:30
● 2026-03-25 04:36:38
●A13.226.238.1102026-02-23 → 2026-03-25 · 38 obs
○ 2018-06-19 07:30:52
● 2026-02-23 12:17:30
● 2026-02-24 01:55:54
○ 2026-02-25 06:43:12
● 2026-02-27 07:09:24
● 2026-02-28 13:43:52
○ 2026-02-28 14:28:06
○ 2026-03-01 10:25:52
● 2026-03-01 14:00:58
● 2026-03-02 12:30:24
○ 2026-03-02 13:49:20
● 2026-03-03 00:56:38
○ 2026-03-03 10:36:54
○ 2026-03-06 02:18:26
● 2026-03-07 00:57:50
○ 2026-03-07 03:21:04
○ 2026-03-14 21:25:40
● 2026-03-15 01:13:22
○ 2026-03-15 02:30:02
○ 2026-03-16 04:06:36
● 2026-03-16 15:34:12
● 2026-03-16 21:17:42
○ 2026-03-16 23:22:08
○ 2026-03-17 00:36:36
● 2026-03-17 01:27:42
● 2026-03-17 06:26:00
○ 2026-03-17 08:06:32
○ 2026-03-17 21:36:44
● 2026-03-18 09:40:44
● 2026-03-19 08:02:18
○ 2026-03-19 16:34:54
○ 2026-03-22 15:05:18
● 2026-03-23 00:21:12
● 2026-03-23 02:50:38
○ 2026-03-23 18:42:16
○ 2026-03-24 12:42:40
● 2026-03-24 21:44:00
● 2026-03-25 04:36:38
●A13.226.238.152026-02-23 → 2026-03-25 · 38 obs
○ 2018-06-19 07:30:52
● 2026-02-23 12:17:30
● 2026-02-24 01:55:54
○ 2026-02-25 06:43:12
● 2026-02-27 07:09:24
● 2026-02-28 13:43:52
○ 2026-02-28 14:28:06
○ 2026-03-01 10:25:52
● 2026-03-01 14:00:58
● 2026-03-02 12:30:24
○ 2026-03-02 13:49:20
● 2026-03-03 00:56:38
○ 2026-03-03 10:36:54
○ 2026-03-06 02:18:26
● 2026-03-07 00:57:50
○ 2026-03-07 03:21:04
○ 2026-03-14 21:25:40
● 2026-03-15 01:13:22
○ 2026-03-15 02:30:02
○ 2026-03-16 04:06:36
● 2026-03-16 15:34:12
● 2026-03-16 21:17:42
○ 2026-03-16 23:22:08
○ 2026-03-17 00:36:36
● 2026-03-17 01:27:42
● 2026-03-17 06:26:00
○ 2026-03-17 08:06:32
○ 2026-03-17 21:36:44
● 2026-03-18 09:40:44
● 2026-03-19 08:02:18
○ 2026-03-19 16:34:54
○ 2026-03-22 15:05:18
● 2026-03-23 00:21:12
● 2026-03-23 02:50:38
○ 2026-03-23 18:42:16
○ 2026-03-24 12:42:40
● 2026-03-24 21:44:00
● 2026-03-25 04:36:38
●A13.226.238.602026-02-23 → 2026-03-25 · 38 obs
○ 2018-06-19 07:30:52
● 2026-02-23 12:17:30
● 2026-02-24 01:55:54
○ 2026-02-25 06:43:12
● 2026-02-27 07:09:24
● 2026-02-28 13:43:52
○ 2026-02-28 14:28:06
○ 2026-03-01 10:25:52
● 2026-03-01 14:00:58
● 2026-03-02 12:30:24
○ 2026-03-02 13:49:20
● 2026-03-03 00:56:38
○ 2026-03-03 10:36:54
○ 2026-03-06 02:18:26
● 2026-03-07 00:57:50
○ 2026-03-07 03:21:04
○ 2026-03-14 21:25:40
● 2026-03-15 01:13:22
○ 2026-03-15 02:30:02
○ 2026-03-16 04:06:36
● 2026-03-16 15:34:12
● 2026-03-16 21:17:42
○ 2026-03-16 23:22:08
○ 2026-03-17 00:36:36
● 2026-03-17 01:27:42
● 2026-03-17 06:26:00
○ 2026-03-17 08:06:32
○ 2026-03-17 21:36:44
● 2026-03-18 09:40:44
● 2026-03-19 08:02:18
○ 2026-03-19 16:34:54
○ 2026-03-22 15:05:18
● 2026-03-23 00:21:12
● 2026-03-23 02:50:38
○ 2026-03-23 18:42:16
○ 2026-03-24 12:42:40
● 2026-03-24 21:44:00
● 2026-03-25 04:36:38
●A13.226.238.632026-02-23 → 2026-03-25 · 38 obs
○ 2018-06-19 07:30:52
● 2026-02-23 12:17:30
● 2026-02-24 01:55:54
○ 2026-02-25 06:43:12
● 2026-02-27 07:09:24
● 2026-02-28 13:43:52
○ 2026-02-28 14:28:06
○ 2026-03-01 10:25:52
● 2026-03-01 14:00:58
● 2026-03-02 12:30:24
○ 2026-03-02 13:49:20
● 2026-03-03 00:56:38
○ 2026-03-03 10:36:54
○ 2026-03-06 02:18:26
● 2026-03-07 00:57:50
○ 2026-03-07 03:21:04
○ 2026-03-14 21:25:40
● 2026-03-15 01:13:22
○ 2026-03-15 02:30:02
○ 2026-03-16 04:06:36
● 2026-03-16 15:34:12
● 2026-03-16 21:17:42
○ 2026-03-16 23:22:08
○ 2026-03-17 00:36:36
● 2026-03-17 01:27:42
● 2026-03-17 06:26:00
○ 2026-03-17 08:06:32
○ 2026-03-17 21:36:44
● 2026-03-18 09:40:44
● 2026-03-19 08:02:18
○ 2026-03-19 16:34:54
○ 2026-03-22 15:05:18
● 2026-03-23 00:21:12
● 2026-03-23 02:50:38
○ 2026-03-23 18:42:16
○ 2026-03-24 12:42:40
● 2026-03-24 21:44:00
● 2026-03-25 04:36:38
○A13.33.252.122026-03-14 → 2026-03-22 · 10 obs
○ 2026-03-13 02:23:44
● 2026-03-14 01:51:18
○ 2026-03-14 02:29:06
○ 2026-03-14 07:27:06
● 2026-03-14 15:26:34
○ 2026-03-14 17:12:16
○ 2026-03-22 01:44:16
● 2026-03-22 15:05:18
○ 2026-03-23 00:21:12
○ 2026-03-25 04:36:38
○A13.33.252.522026-03-14 → 2026-03-22 · 10 obs
○ 2026-03-13 02:23:44
● 2026-03-14 01:51:18
○ 2026-03-14 02:29:06
○ 2026-03-14 07:27:06
● 2026-03-14 15:26:34
○ 2026-03-14 17:12:16
○ 2026-03-22 01:44:16
● 2026-03-22 15:05:18
○ 2026-03-23 00:21:12
○ 2026-03-25 04:36:38
○A13.33.252.562026-03-14 → 2026-03-22 · 10 obs
○ 2026-03-13 02:23:44
● 2026-03-14 01:51:18
○ 2026-03-14 02:29:06
○ 2026-03-14 07:27:06
● 2026-03-14 15:26:34
○ 2026-03-14 17:12:16
○ 2026-03-22 01:44:16
● 2026-03-22 15:05:18
○ 2026-03-23 00:21:12
○ 2026-03-25 04:36:38
○A13.33.252.672026-03-14 → 2026-03-22 · 10 obs
○ 2026-03-13 02:23:44
● 2026-03-14 01:51:18
○ 2026-03-14 02:29:06
○ 2026-03-14 07:27:06
● 2026-03-14 15:26:34
○ 2026-03-14 17:12:16
○ 2026-03-22 01:44:16
● 2026-03-22 15:05:18
○ 2026-03-23 00:21:12
○ 2026-03-25 04:36:38
○A18.172.153.1202026-02-28 → 2026-03-23 · 39 obs
○ 2026-02-28 13:43:52
● 2026-02-28 14:28:06
○ 2026-03-01 10:25:52
○ 2026-03-02 12:30:24
● 2026-03-02 13:49:20
○ 2026-03-03 00:56:38
○ 2026-03-03 10:36:54
● 2026-03-04 22:48:46
○ 2026-03-05 03:52:20
○ 2026-03-07 00:57:50
● 2026-03-07 03:21:04
● 2026-03-13 02:23:44
○ 2026-03-14 01:51:18
● 2026-03-14 02:29:06
● 2026-03-14 07:27:06
○ 2026-03-14 15:26:34
● 2026-03-14 17:12:16
● 2026-03-14 17:50:12
○ 2026-03-14 21:25:40
○ 2026-03-15 01:13:22
● 2026-03-15 02:30:02
● 2026-03-15 14:32:12
○ 2026-03-15 17:07:52
○ 2026-03-16 21:17:42
● 2026-03-16 23:22:08
● 2026-03-17 00:36:36
○ 2026-03-17 01:27:42
○ 2026-03-17 08:06:32
● 2026-03-17 14:04:28
● 2026-03-17 21:36:44
○ 2026-03-18 09:40:44
○ 2026-03-19 08:02:18
● 2026-03-19 16:34:54
● 2026-03-22 01:44:16
○ 2026-03-22 15:05:18
○ 2026-03-23 02:50:38
● 2026-03-23 18:42:16
○ 2026-03-24 12:42:40
○ 2026-03-25 04:36:38
○A18.172.153.392026-02-28 → 2026-03-23 · 39 obs
○ 2026-02-28 13:43:52
● 2026-02-28 14:28:06
○ 2026-03-01 10:25:52
○ 2026-03-02 12:30:24
● 2026-03-02 13:49:20
○ 2026-03-03 00:56:38
○ 2026-03-03 10:36:54
● 2026-03-04 22:48:46
○ 2026-03-05 03:52:20
○ 2026-03-07 00:57:50
● 2026-03-07 03:21:04
● 2026-03-13 02:23:44
○ 2026-03-14 01:51:18
● 2026-03-14 02:29:06
● 2026-03-14 07:27:06
○ 2026-03-14 15:26:34
● 2026-03-14 17:12:16
● 2026-03-14 17:50:12
○ 2026-03-14 21:25:40
○ 2026-03-15 01:13:22
● 2026-03-15 02:30:02
● 2026-03-15 14:32:12
○ 2026-03-15 17:07:52
○ 2026-03-16 21:17:42
● 2026-03-16 23:22:08
● 2026-03-17 00:36:36
○ 2026-03-17 01:27:42
○ 2026-03-17 08:06:32
● 2026-03-17 14:04:28
● 2026-03-17 21:36:44
○ 2026-03-18 09:40:44
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● 2026-03-19 16:34:54
● 2026-03-22 01:44:16
○ 2026-03-22 15:05:18
○ 2026-03-23 02:50:38
● 2026-03-23 18:42:16
○ 2026-03-24 12:42:40
○ 2026-03-25 04:36:38
○A18.172.153.432026-02-28 → 2026-03-23 · 39 obs
○ 2026-02-28 13:43:52
● 2026-02-28 14:28:06
○ 2026-03-01 10:25:52
○ 2026-03-02 12:30:24
● 2026-03-02 13:49:20
○ 2026-03-03 00:56:38
○ 2026-03-03 10:36:54
● 2026-03-04 22:48:46
○ 2026-03-05 03:52:20
○ 2026-03-07 00:57:50
● 2026-03-07 03:21:04
● 2026-03-13 02:23:44
○ 2026-03-14 01:51:18
● 2026-03-14 02:29:06
● 2026-03-14 07:27:06
○ 2026-03-14 15:26:34
● 2026-03-14 17:12:16
● 2026-03-14 17:50:12
○ 2026-03-14 21:25:40
○ 2026-03-15 01:13:22
● 2026-03-15 02:30:02
● 2026-03-15 14:32:12
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● 2026-03-16 23:22:08
● 2026-03-17 00:36:36
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○ 2026-03-17 08:06:32
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● 2026-03-22 01:44:16
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○ 2026-03-23 02:50:38
● 2026-03-23 18:42:16
○ 2026-03-24 12:42:40
○ 2026-03-25 04:36:38
○A18.172.153.762026-02-28 → 2026-03-23 · 39 obs
○ 2026-02-28 13:43:52
● 2026-02-28 14:28:06
○ 2026-03-01 10:25:52
○ 2026-03-02 12:30:24
● 2026-03-02 13:49:20
○ 2026-03-03 00:56:38
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● 2026-03-04 22:48:46
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● 2026-03-23 18:42:16
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○ 2026-03-25 04:36:38
○A18.65.3.102026-02-25 → 2026-03-17 · 23 obs
○ 2026-02-24 01:55:54
● 2026-02-25 06:43:12
○ 2026-02-27 07:09:24
○ 2026-02-28 14:28:06
● 2026-03-01 10:25:52
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○A18.65.3.1212026-02-25 → 2026-03-17 · 23 obs
○ 2026-02-24 01:55:54
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○A18.65.3.142026-02-25 → 2026-03-17 · 23 obs
○ 2026-02-24 01:55:54
● 2026-02-25 06:43:12
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● 2026-03-01 10:25:52
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○A18.65.3.642026-02-25 → 2026-03-17 · 23 obs
○ 2026-02-24 01:55:54
● 2026-02-25 06:43:12
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○A184.168.221.132015-07-20 → 2015-11-20 · 4 obs
● 2015-07-20 13:42:56
● 2015-11-20 08:20:06
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○A198.71.233.1352018-06-19 → 2018-06-19 · 4 obs
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○A3.174.113.132026-03-24 → 2026-03-24 · 4 obs
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○A3.174.113.232026-03-24 → 2026-03-24 · 4 obs
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● 2026-03-24 12:42:40
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○A3.174.113.522026-03-24 → 2026-03-24 · 4 obs
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● 2026-03-24 12:42:40
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○ 2026-03-25 04:36:38
○A3.174.113.92026-03-24 → 2026-03-24 · 4 obs
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● 2026-03-24 12:42:40
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○ 2026-03-25 04:36:38

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coma.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...-
upfrontbooks.comns-436.awsdns-54.com, ns-976.awsdns-58.net, ns-1872.awsdns-42.co.uk, ns-1521.awsdns-62.org1 record

✅ Authoritative Response

Server:205.251.193.180

NS records: ns-436.awsdns-54.com, ns-976.awsdns-58.net, ns-1872.awsdns-42.co.uk, ns-1521.awsdns-62.org

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for upfrontbooks.com (unsigned zone)

⏱️ Timing

Total: 1391ms | Queries: -

📄 Records

TypeCountSample Data
A413.226.238.15, 13.226.238.60...
NS4ns-1521.awsdns-62.org, ns-1872.awsdns-42.co.uk...
MX2usb-smtp-inbound-1.mimecast.com (pri: 10, usb-smtp-inbound-2.mimecast.com (pri: 20
TXT3MS=ms47732836, ppe-eebf919500a439099a79b12659526048bea8...
SOA1ns-1521.awsdns-62.org awsdns-hostmaster.

📌 Glue Records Collected

Total: 1

Out-of-bailiwick: 1 (ns-436.awsdns-54.com)

Analysis

IP Addresses

upfrontbooks.com maps to four IP numbers: 13.226.238.15, 13.226.238.60, 13.226.238.63 and 13.226.238.110.

Other host names such as digisphere.me, streamecho.net, *.jocsalairelliure.cat, wisberghome.fr and d3bzmblnmr8j97.cloudfront.net share IPs with upfrontbooks.com.

Name Servers

upfrontbooks.com is delegated to four name servers: ns-436.awsdns-54.com, ns-976.awsdns-58.net, ns-1521.awsdns-62.org and ns-1872.awsdns-42.co.uk.

upfrontbooks.com at least partially shares name servers with other domains, for example dm0a8fxlvor5i.cloudfront.net, tvklar.de, goinfusive.com, skillpages.com and camelgames-wao.com.

Name servers ns-204.awsdns-25.com, ns-cloud-b1.googledomains.com, ns-cloud-b2.googledomains.com, ns-cloud-b3.googledomains.com, ns-cloud-b4.googledomains.com, ns-1370.awsdns-43.org and ns-1997.awsdns-57.co.uk are commonly used together.

Host names with two IP numbers:

ns-436.awsdns-54.com points to: 2600:9000:5301:b400::1 and 205.251.193.180

ns-976.awsdns-58.net points to: 2600:9000:5303:d000::1 and 205.251.195.208

ns-1521.awsdns-62.org points to: 2600:9000:5305:f100::1 and 205.251.197.241

ns-1872.awsdns-42.co.uk points to: 2600:9000:5307:5000::1 and 205.251.199.80

Mail Servers

Two mail servers handle upfrontbooks.com: usb-smtp-inbound-1.mimecast.com and usb-smtp-inbound-2.mimecast.com.

upfrontbooks.com shares the same mail server setup as other domains, including brownvstoredvaluecards.com, lifetimeptchiro.com, ssd.fsi.com, baneng.com and scansecurity.net.

upfrontbooks.com shares at least partially some mail servers with other domains, for instance seaboard.com.ec, mail2.onsemi.com, bigriverunitedenergy.com, usazrws005.ad.onsemi.com and amgurdqovruwdrg.onsemi.com.

Names with two IPs:

usb-smtp-inbound-1.mimecast.com points to: 170.10.150.242 and 170.10.152.242.

usb-smtp-inbound-2.mimecast.com points to: 170.10.150.242 and 170.10.152.242.

Names pointing to 170.10.150.242: usb-smtp-inbound-1.mimecast.com and usb-smtp-inbound-2.mimecast.com.

Names pointing to 170.10.152.242: usb-smtp-inbound-1.mimecast.com and usb-smtp-inbound-2.mimecast.com.