rubycentral.org - dns.ninja

rubycentral.org

DNSSEC⚠️ Not signed
A2a04:4e42:d::775🇺🇸 Fastly2a04:4e42:d::/48
A151.101.55.7🇺🇸 Fastly151.101.52.0/22
NSns1.dnsimple-edge.com ⭐
A2620:111:8004::53🇺🇸 AS327712620:111:8004::/48 DNSimple Corporation
A199.247.152.53🇺🇸 AS32771199.247.152.0/24 DNSimple Corporation
NSns2.dnsimple-edge.net
A2620:111:8005::53🇺🇸 AS327712620:111:8005::/48 Vultr Customer Route
A199.247.153.53🇺🇸 AS32771199.247.153.0/24 Vultr Customer Route
NSns3.dnsimple-edge.io
A2620:111:8006::53🇺🇸 AS327712620:111:8006::/48 DNSimple Corporation
A199.247.154.53🇺🇸 AS32771199.247.154.0/24 DNSimple Corporation
NSns4.dnsimple-edge.org
A2620:111:8007::53🇺🇸 AS327712620:111:8007::/48 Vultr Customer Route
A199.247.155.53🇺🇸 AS32771199.247.155.0/24 Vultr Customer Route
MXaspmx.l.google.com ⭐
A2607:f8b0:4004:c1b::1a🇺🇸 Google2607:f8b0:4004::/48
PTRwv-in-f26.1e100.net
A172.253.115.26🇺🇸 Google172.253.115.0/24
PTRbg-in-f26.1e100.net
MXalt1.aspmx.l.google.com(20)
A2800:3f0:4003:c0f::1b🇨🇱 Google2800:3f0:4003::/48
A108.177.123.26🇺🇸 Google108.177.123.0/24
PTRlcscld-in-f26.1e100.net
MXalt2.aspmx.l.google.com(20)
A2a00:1450:400b:c02::1a🇮🇪 Google2a00:1450:400b::/48
PTRdj-in-f26.1e100.net
A172.253.116.26🇺🇸 Google172.253.116.0/24
PTRdj-in-f26.1e100.net
MXaspmx2.googlemail.com(30)
A2800:3f0:4003:c0f::1a🇨🇱 Google2800:3f0:4003::/48
A108.177.123.27🇺🇸 Google108.177.123.0/24
PTRlcscld-in-f27.1e100.net
MXaspmx3.googlemail.com(30)
A2a00:1450:400b:c02::1b🇮🇪 Google2a00:1450:400b::/48
PTRdj-in-f27.1e100.net
A172.253.116.26🇺🇸 Google172.253.116.0/24
PTRdj-in-f26.1e100.net
MXaspmx4.googlemail.com(30)
A2a00:1450:4009:c0f::1a🇬🇧 Google2a00:1450:4009::/48
PTRyulhrs-in-f26.1e100.net
A192.178.223.26🇺🇸 Google192.178.223.0/24
PTRyulhrs-in-f26.1e100.net
MXaspmx5.googlemail.com(30)
A2a00:1450:400c:c23::1a🇧🇪 Google2a00:1450:400c::/48
PTRyubrupd-in-f26.1e100.net
A172.253.157.27🇺🇸 Google172.253.0.0/16
PTRyubrupd-in-f27.1e100.net
TXTgoogle-site-verification=KUBUM3nwV3yMRUPY3ThIU8psj4ICBC4Jls9YLokKPJM
TXTv=spf1 a include:_spf.google.com ~all
SOAns1.dnsimple-edge.comadmin@dnsimple.com 2013-02-20 #55

org

DNSSEC🔒 Signed (DS record present)
NSa0.org.afilias-nst.info ⭐ ⚠️ Not in parent delegation
NSa2.org.afilias-nst.info ⚠️ Not in parent delegation
NSb0.org.afilias-nst.org
NSb2.org.afilias-nst.org
NSc0.org.afilias-nst.info ⚠️ Not in parent delegation
NSd0.org.afilias-nst.org
SOAa0.org.afilias-nst.infohostmaster@donuts.email serial=1783783063
rank #106173 globally
rank #9637 in the tld
WOT: SAFE (68/100)
📈 Tranco rank: #393,072

Subdomains

cfp.rubycentral.org

Same first word

rubycentral.github.io
rubycentral.com
rubycentral.org

Similar names

cutlerybarn.com

DNS History

53 records (13 active, 40 former)

20162017201820192020202120222023202420252026NSns1.dnsimple-edge.comns2.dnsimple-edge.netns3.dnsimple-edge.ions4.dnsimple-edge.orgns1.dnsimple.comns2.dnsimple.comns3.dnsimple.comns4.dnsimple.comMXalt1.aspmx.l.google.comalt2.aspmx.l.google.comaspmx.l.google.comaspmx2.googlemail.comaspmx3.googlemail.comaspmx4.googlemail.comaspmx5.googlemail.comA151.101.55.72a04:4e42:d::775107.21.103.136107.21.208.134146.75.31.7146.75.35.7146.75.39.7151.101.123.7151.101.39.7151.101.43.7174.129.192.57184.73.246.127199.232.135.7199.232.171.7204.236.218.116204.236.218.4523.21.61.15023.21.97.8623.23.172.7623.23.255.2212a04:4e42:1d::7752a04:4e42:61::7752a04:4e42:6a::7752a04:4e42:77::7752a04:4e42:78::7752a04:4e42:79::7752a04:4e42:84::7752a04:4e42:9::7752a04:4e42:a::77550.16.204.9454.197.245.18254.197.245.25454.225.69.14654.225.74.12754.235.206.3554.243.171.11854.243.221.23554.243.225.35
●NSns1.dnsimple-edge.com2026-05-17 → 2026-07-11 · 3 obs
○ 2026-05-11 15:53:44
● 2026-05-17 14:43:26
● 2026-07-11 15:34:08
○NSns1.dnsimple.com2015-08-25 → 2026-05-11 · 4 obs
● 2015-08-25 01:05:42
● 2026-05-11 15:53:44
○ 2026-05-17 14:43:26
○ 2026-07-11 15:34:08
●NSns2.dnsimple-edge.net2026-02-21 → 2026-07-11 · 3 obs
○ 2017-04-01 16:52:22
● 2026-02-21 01:09:08
● 2026-07-11 15:34:08
○NSns2.dnsimple.com2015-08-25 → 2017-04-01 · 4 obs
● 2015-08-25 01:05:42
● 2017-04-01 16:52:22
○ 2026-02-21 01:09:08
○ 2026-07-11 15:34:08
●NSns3.dnsimple-edge.io2026-05-17 → 2026-07-11 · 3 obs
○ 2026-05-11 15:53:44
● 2026-05-17 14:43:26
● 2026-07-11 15:34:08
○NSns3.dnsimple.com2015-08-25 → 2026-05-11 · 4 obs
● 2015-08-25 01:05:42
● 2026-05-11 15:53:44
○ 2026-05-17 14:43:26
○ 2026-07-11 15:34:08
●NSns4.dnsimple-edge.org2026-02-21 → 2026-07-11 · 3 obs
○ 2017-04-01 16:52:22
● 2026-02-21 01:09:08
● 2026-07-11 15:34:08
○NSns4.dnsimple.com2015-08-25 → 2017-04-01 · 4 obs
● 2015-08-25 01:05:42
● 2017-04-01 16:52:22
○ 2026-02-21 01:09:08
○ 2026-07-11 15:34:08
●MXalt1.aspmx.l.google.com2015-08-25 → 2026-07-11 · 2 obs
● 2015-08-25 01:05:42
● 2026-07-11 15:34:08
●MXalt2.aspmx.l.google.com2015-08-25 → 2026-07-11 · 2 obs
● 2015-08-25 01:05:42
● 2026-07-11 15:34:08
●MXaspmx.l.google.com2015-08-25 → 2026-07-11 · 2 obs
● 2015-08-25 01:05:42
● 2026-07-11 15:34:08
●MXaspmx2.googlemail.com2015-08-25 → 2026-07-11 · 2 obs
● 2015-08-25 01:05:42
● 2026-07-11 15:34:08
●MXaspmx3.googlemail.com2015-08-25 → 2026-07-11 · 2 obs
● 2015-08-25 01:05:42
● 2026-07-11 15:34:08
●MXaspmx4.googlemail.com2015-08-25 → 2026-07-11 · 2 obs
● 2015-08-25 01:05:42
● 2026-07-11 15:34:08
●MXaspmx5.googlemail.com2015-08-25 → 2026-07-11 · 2 obs
● 2015-08-25 01:05:42
● 2026-07-11 15:34:08
○A107.21.103.1362016-04-02 → 2016-04-02 · 4 obs
○ 2015-12-30 09:47:08
● 2016-04-02 15:55:36
○ 2017-04-01 16:52:22
○ 2026-07-11 15:34:08
○A107.21.208.1342015-10-23 → 2015-10-23 · 4 obs
○ 2015-09-18 12:05:24
● 2015-10-23 04:31:46
○ 2015-12-30 09:47:08
○ 2026-07-11 15:34:08
○A146.75.31.72026-03-14 → 2026-03-18 · 10 obs
○ 2026-02-21 01:09:08
○ 2026-03-13 22:51:42
● 2026-03-14 09:01:22
○ 2026-03-14 10:27:56
● 2026-03-15 05:58:58
○ 2026-03-15 07:19:30
○ 2026-03-18 19:37:40
● 2026-03-18 22:21:42
○ 2026-03-19 16:15:00
○ 2026-07-11 15:34:08
○A146.75.35.72026-03-07 → 2026-04-11 · 21 obs
○ 2026-03-06 05:17:18
● 2026-03-07 02:37:58
○ 2026-03-09 10:32:32
○ 2026-03-15 07:19:30
● 2026-03-17 10:34:04
○ 2026-03-17 12:05:28
○ 2026-03-18 14:24:02
● 2026-03-18 19:37:40
○ 2026-03-18 22:21:42
○ 2026-03-22 12:21:42
● 2026-03-23 20:35:08
○ 2026-03-24 08:06:00
○ 2026-04-06 22:17:24
● 2026-04-06 23:38:24
● 2026-04-07 15:44:02
○ 2026-04-08 18:46:18
○ 2026-04-09 17:45:14
● 2026-04-09 21:21:24
● 2026-04-11 07:00:14
○ 2026-04-11 09:39:28
○ 2026-07-11 15:34:08
○A146.75.39.72026-03-14 → 2026-04-06 · 8 obs
○ 2026-03-14 09:01:22
● 2026-03-14 10:27:56
○ 2026-03-15 05:58:58
○ 2026-04-04 02:11:08
● 2026-04-06 07:08:30
● 2026-04-06 22:17:24
○ 2026-04-06 23:38:24
○ 2026-07-11 15:34:08
○A151.101.123.72026-03-19 → 2026-05-20 · 22 obs
○ 2026-03-18 22:21:42
● 2026-03-19 16:15:00
○ 2026-03-21 09:08:28
● 2026-03-22 12:21:42
○ 2026-03-23 20:35:08
● 2026-03-24 08:06:00
○ 2026-03-25 09:50:16
○ 2026-04-07 15:44:02
● 2026-04-08 18:46:18
○ 2026-04-09 17:45:14
○ 2026-04-12 14:01:36
● 2026-04-13 13:04:06
○ 2026-04-16 04:15:08
○ 2026-04-18 18:11:06
● 2026-04-19 02:53:06
○ 2026-04-20 04:01:44
○ 2026-05-11 15:53:44
● 2026-05-17 14:43:26
○ 2026-05-18 08:57:34
● 2026-05-20 15:58:04
○ 2026-05-23 14:22:26
○ 2026-07-11 15:34:08
○A151.101.39.72026-02-21 → 2026-06-18 · 48 obs
○ 2017-04-01 16:52:22
● 2026-02-21 01:09:08
● 2026-03-06 05:17:18
○ 2026-03-07 02:37:58
○ 2026-03-09 10:32:32
● 2026-03-09 15:47:52
● 2026-03-13 22:51:42
○ 2026-03-14 09:01:22
○ 2026-03-15 05:58:58
● 2026-03-15 07:19:30
○ 2026-03-17 10:34:04
● 2026-03-17 12:05:28
● 2026-03-18 14:24:02
○ 2026-03-18 19:37:40
○ 2026-03-19 16:15:00
● 2026-03-21 09:08:28
○ 2026-03-22 12:21:42
○ 2026-03-24 08:06:00
● 2026-03-25 09:50:16
● 2026-03-25 18:25:28
○ 2026-03-27 11:21:50
○ 2026-03-28 16:52:42
● 2026-04-03 02:44:20
● 2026-04-04 02:11:08
○ 2026-04-06 07:08:30
○ 2026-04-08 18:46:18
● 2026-04-09 17:45:14
○ 2026-04-09 21:21:24
○ 2026-04-11 09:39:28
● 2026-04-11 15:12:12
● 2026-04-12 14:01:36
○ 2026-04-13 13:04:06
● 2026-04-16 04:15:08
○ 2026-04-17 02:46:58
● 2026-04-17 03:59:06
○ 2026-04-17 22:17:42
○ 2026-04-19 02:53:06
● 2026-04-20 04:01:44
○ 2026-04-21 18:12:52
○ 2026-06-03 18:20:46
● 2026-06-04 02:52:10
○ 2026-06-04 17:35:24
○ 2026-06-09 10:05:12
● 2026-06-16 11:34:52
○ 2026-06-16 23:50:58
● 2026-06-18 12:00:40
○ 2026-06-21 22:06:30
○ 2026-07-11 15:34:08
○A151.101.43.72026-03-09 → 2026-07-04 · 28 obs
○ 2026-03-07 02:37:58
● 2026-03-09 10:32:32
○ 2026-03-09 15:47:52
○ 2026-03-27 11:21:50
● 2026-03-28 16:52:42
○ 2026-04-03 02:44:20
○ 2026-04-11 07:00:14
● 2026-04-11 09:39:28
○ 2026-04-11 15:12:12
○ 2026-04-16 04:15:08
● 2026-04-17 02:46:58
○ 2026-04-17 03:59:06
● 2026-04-17 22:17:42
● 2026-04-18 18:11:06
○ 2026-04-19 02:53:06
○ 2026-04-21 18:12:52
● 2026-04-29 05:37:58
● 2026-04-29 10:54:36
○ 2026-04-30 03:26:30
○ 2026-05-23 14:22:26
● 2026-05-26 07:10:30
○ 2026-05-29 13:18:46
○ 2026-06-16 11:34:52
● 2026-06-16 23:50:58
○ 2026-06-18 12:00:40
● 2026-07-04 04:18:10
○ 2026-07-10 04:37:52
○ 2026-07-11 15:34:08
●A151.101.55.72026-06-04 → 2026-07-11 · 8 obs
○ 2026-06-04 02:52:10
● 2026-06-04 17:35:24
● 2026-06-09 10:05:12
○ 2026-06-16 11:34:52
● 2026-06-21 22:06:30
○ 2026-07-04 04:18:10
● 2026-07-10 04:37:52
● 2026-07-11 15:34:08
○A174.129.192.572015-08-25 → 2015-08-25 · 3 obs
● 2015-08-25 01:05:42
○ 2015-09-18 12:05:24
○ 2026-07-11 15:34:08
○A184.73.246.1272015-09-18 → 2015-09-18 · 4 obs
○ 2015-08-25 01:05:42
● 2015-09-18 12:05:24
○ 2015-10-23 04:31:46
○ 2026-07-11 15:34:08
○A199.232.135.72026-04-30 → 2026-06-03 · 11 obs
○ 2026-04-29 10:54:36
● 2026-04-30 03:26:30
● 2026-05-11 15:53:44
○ 2026-05-17 14:43:26
● 2026-05-18 08:57:34
○ 2026-05-20 15:58:04
○ 2026-05-26 07:10:30
● 2026-05-29 13:18:46
● 2026-06-03 18:20:46
○ 2026-06-04 02:52:10
○ 2026-07-11 15:34:08
○A199.232.171.72026-03-27 → 2026-05-23 · 10 obs
○ 2026-03-25 18:25:28
● 2026-03-27 11:21:50
○ 2026-03-28 16:52:42
○ 2026-04-20 04:01:44
● 2026-04-21 18:12:52
○ 2026-04-29 05:37:58
○ 2026-05-20 15:58:04
● 2026-05-23 14:22:26
○ 2026-05-26 07:10:30
○ 2026-07-11 15:34:08
○A204.236.218.1162015-08-25 → 2015-08-25 · 3 obs
● 2015-08-25 01:05:42
○ 2015-09-18 12:05:24
○ 2026-07-11 15:34:08
○A204.236.218.452015-09-18 → 2015-09-18 · 4 obs
○ 2015-08-25 01:05:42
● 2015-09-18 12:05:24
○ 2026-02-21 01:09:08
○ 2026-07-11 15:34:08
○A23.21.61.1502015-08-25 → 2015-08-25 · 3 obs
● 2015-08-25 01:05:42
○ 2015-09-18 12:05:24
○ 2026-07-11 15:34:08
○A23.21.97.862015-08-25 → 2015-09-18 · 4 obs
● 2015-08-25 01:05:42
● 2015-09-18 12:05:24
○ 2026-02-21 01:09:08
○ 2026-07-11 15:34:08
○A23.23.172.762015-08-25 → 2015-08-25 · 3 obs
● 2015-08-25 01:05:42
○ 2015-09-18 12:05:24
○ 2026-07-11 15:34:08
○A23.23.255.2212015-08-25 → 2015-08-25 · 3 obs
● 2015-08-25 01:05:42
○ 2015-09-18 12:05:24
○ 2026-07-11 15:34:08
○A2a04:4e42:1d::7752026-03-21 → 2026-05-23 · 18 obs
○ 2026-03-19 16:15:00
● 2026-03-21 09:08:28
● 2026-03-22 12:21:42
○ 2026-03-23 20:35:08
○ 2026-03-25 18:25:28
● 2026-03-27 11:21:50
○ 2026-03-28 16:52:42
○ 2026-04-11 09:39:28
● 2026-04-11 15:12:12
● 2026-04-12 14:01:36
○ 2026-04-13 13:04:06
○ 2026-04-17 02:46:58
● 2026-04-17 03:59:06
○ 2026-04-17 22:17:42
○ 2026-05-20 15:58:04
● 2026-05-23 14:22:26
○ 2026-05-26 07:10:30
○ 2026-07-11 15:34:08
○A2a04:4e42:61::7752026-04-30 → 2026-06-03 · 11 obs
○ 2026-04-29 10:54:36
● 2026-04-30 03:26:30
● 2026-05-11 15:53:44
○ 2026-05-17 14:43:26
● 2026-05-18 08:57:34
○ 2026-05-20 15:58:04
○ 2026-05-26 07:10:30
● 2026-05-29 13:18:46
● 2026-06-03 18:20:46
○ 2026-06-04 02:52:10
○ 2026-07-11 15:34:08
○A2a04:4e42:6a::7752026-03-24 → 2026-05-20 · 12 obs
○ 2026-03-23 20:35:08
● 2026-03-24 08:06:00
○ 2026-03-25 09:50:16
○ 2026-04-08 18:46:18
● 2026-04-09 17:45:14
○ 2026-04-09 21:21:24
○ 2026-05-11 15:53:44
● 2026-05-17 14:43:26
○ 2026-05-18 08:57:34
● 2026-05-20 15:58:04
○ 2026-05-23 14:22:26
○ 2026-07-11 15:34:08
○A2a04:4e42:77::7752026-03-15 → 2026-04-11 · 10 obs
○ 2026-03-14 10:27:56
● 2026-03-15 05:58:58
○ 2026-03-15 07:19:30
○ 2026-03-22 12:21:42
● 2026-03-23 20:35:08
○ 2026-03-24 08:06:00
○ 2026-04-09 21:21:24
● 2026-04-11 07:00:14
○ 2026-04-11 09:39:28
○ 2026-07-11 15:34:08
○A2a04:4e42:78::7752026-03-07 → 2026-04-07 · 17 obs
○ 2026-02-21 01:09:08
○ 2026-03-06 05:17:18
● 2026-03-07 02:37:58
○ 2026-03-09 10:32:32
○ 2026-03-13 22:51:42
● 2026-03-14 09:01:22
○ 2026-03-14 10:27:56
○ 2026-03-15 07:19:30
● 2026-03-17 10:34:04
○ 2026-03-17 12:05:28
○ 2026-04-04 02:11:08
● 2026-04-06 07:08:30
○ 2026-04-06 22:17:24
○ 2026-04-06 23:38:24
● 2026-04-07 15:44:02
○ 2026-04-08 18:46:18
○ 2026-07-11 15:34:08
○A2a04:4e42:79::7752026-03-14 → 2026-04-09 · 15 obs
○ 2026-03-14 09:01:22
● 2026-03-14 10:27:56
○ 2026-03-15 05:58:58
○ 2026-03-18 14:24:02
● 2026-03-18 19:37:40
● 2026-03-18 22:21:42
○ 2026-03-19 16:15:00
○ 2026-04-06 07:08:30
● 2026-04-06 22:17:24
● 2026-04-06 23:38:24
○ 2026-04-07 15:44:02
○ 2026-04-09 17:45:14
● 2026-04-09 21:21:24
○ 2026-04-11 07:00:14
○ 2026-07-11 15:34:08
○A2a04:4e42:84::7752026-02-24 → 2026-02-24 · 4 obs
○ 2026-02-21 21:13:06
● 2026-02-24 13:09:56
○ 2026-02-27 20:11:00
○ 2026-07-11 15:34:08
○A2a04:4e42:9::7752026-02-21 → 2026-06-18 · 48 obs
○ 2017-04-01 16:52:22
● 2026-02-21 01:09:08
● 2026-02-21 21:13:06
○ 2026-02-24 13:09:56
● 2026-02-27 20:11:00
● 2026-03-06 05:17:18
○ 2026-03-07 02:37:58
○ 2026-03-09 10:32:32
● 2026-03-09 15:47:52
● 2026-03-13 22:51:42
○ 2026-03-14 09:01:22
○ 2026-03-15 05:58:58
● 2026-03-15 07:19:30
○ 2026-03-17 10:34:04
● 2026-03-17 12:05:28
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○A2a04:4e42:a::7752026-03-09 → 2026-07-04 · 28 obs
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○A50.16.204.942015-08-25 → 2015-08-25 · 3 obs
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○A54.197.245.1822015-09-18 → 2015-09-18 · 4 obs
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○A54.243.171.1182017-04-01 → 2017-04-01 · 4 obs
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○ 2026-07-11 15:34:08

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
orgb2.org.afilias-nst.org, d0.org.afilias-nst.org, b0.org.afilias-nst.org-
rubycentral.orgns2.dnsimple-edge.net, ns4.dnsimple-edge.org, ns1.dnsimple-edge.com, ns3.dnsimple-edge.io2 records

✅ Authoritative Response

Server:199.247.154.53

NS records: ns2.dnsimple-edge.net, ns4.dnsimple-edge.org, ns1.dnsimple-edge.com, ns3.dnsimple-edge.io

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for rubycentral.org (unsigned zone)

⏱️ Timing

Total: 1156ms | Queries: -

📄 Records

TypeCountSample Data
A1151.101.55.7
AAAA12a04:4e42:d::775
NS4ns1.dnsimple-edge.com, ns2.dnsimple-edge.net...
MX7aspmx.l.google.com (pri: 10), alt1.aspmx.l.google.com (pri: 20)...
TXT2google-site-verification=KUBUM3nwV3yMRUP, v=spf1 a include:_spf.google.com ~all
SOA1ns1.dnsimple-edge.com admin.dnsimple.com

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns4.dnsimple-edge.org, ns4.dnsimple-edge.org)

Analysis

Hierarchy

rubycentral.org is the parent zone for cfp.rubycentral.org.

IP Addresses

rubycentral.org directs to two IP numbers, 151.101.55.7 and 2a04:4e42:d::775

Two other host names, along with idunno.org, 815main.com and adarsh.io, also share IP numbers with rubycentral.org.

Name Servers

The NS records for rubycentral.org point to four name servers: ns1.dnsimple-edge.com, ns3.dnsimple-edge.io, ns2.dnsimple-edge.net and ns4.dnsimple-edge.org.

rubycentral.org partially shares its NS delegation with several other domains, including czechaffair.com, smithburgess.com, lesmedicaments.ca and two others.

These name servers are regularly seen alongside ns1.dnsimple.com and ns3.dnsimple.com as name servers.

ns1.dnsimple-edge.com, ns3.dnsimple-edge.io, ns2.dnsimple-edge.net and ns4.dnsimple-edge.org each carry two IP addresses. ns1.dnsimple-edge.com has 199.247.152.53 and 2620:111:8004::53; ns3.dnsimple-edge.io has 199.247.154.53 and 2620:111:8006::53; ns2.dnsimple-edge.net has 199.247.153.53 and 2620:111:8005::53; ns4.dnsimple-edge.org has 199.247.155.53 and 2620:111:8007::53.

Mail Servers

The MX records for rubycentral.org point to 7 mail servers — aspmx2.googlemail.com, aspmx3.googlemail.com, aspmx4.googlemail.com and 4 other.

There is at least a partial MX overlap between rubycentral.org and other domains, including tux-server.nl, regenerativedesigngroup.com, noncooks.com and two others.

These mail servers tend to appear in combination with mail servers aspmx.l.google.com, alt2.aspmx.l.google.com, alt1.aspmx.l.google.com and 3 others.

Host names that have two IP addresses:

aspmx2.googlemail.com maps to two IP addresses — 108.177.123.27 and 2800:3f0:4003:c0f::1a.

aspmx3.googlemail.com maps to two IP addresses — 172.253.116.26 and 2a00:1450:400b:c02::1b.

aspmx4.googlemail.com maps to two IP addresses — 192.178.223.26 and 2a00:1450:4009:c0f::1a.

aspmx5.googlemail.com maps to two IP addresses — 172.253.157.27 and 2a00:1450:400c:c23::1a.

aspmx.l.google.com maps to two IP addresses — 172.253.115.26 and 2607:f8b0:4004:c1b::1a.

alt1.aspmx.l.google.com maps to two IP addresses — 108.177.123.26 and 2800:3f0:4003:c0f::1b.

alt2.aspmx.l.google.com maps to two IP addresses — 172.253.116.26 and 2a00:1450:400b:c02::1a.

These two host names — aspmx3.googlemail.com and alt2.aspmx.l.google.com — each point to 172.253.116.26 IP addresses.