Check DNS records A

TTL

21600

172.217.20.179

300

Hop	Hostname	Asn	Loss (%)	Sent	Avg (ms)	Best (ms)	Worst (ms)	Stddev
1	ip-172-18-0-1.ec2.internal (172.18.0.1)	AS???	0	2	0.06	0.05	0.07	0.02
2	100.100.38.40	AS???	0	2	2	0.5	4	3
3	240.0.184.13	AS???	0	2	0.8	0.8	0.8	0.03
4	100.100.36.96	AS???	0	2	6	0.6	10	8
5	99.82.180.135	AS16509	0	2	2	1	2	0.4
6	142.251.71.129	AS15169	0	2	2	1	3	1
7	192.178.242.26	AS15169	0	2	7	1	10	8
8	142.251.49.73	AS15169	0	2	2	2	2	0.3
9	142.250.59.233	AS15169	0	2	3	2	3	0.8
10	142.250.209.246	AS15169	0	2	2	2	2	0.02
11	142.250.238.7	AS15169	0	2	3	2	3	0.09
12	???	AS???	100	2	0	0	0	0
13	???	AS???	100	2	0	0	0	0
14	???	AS???	100	2	0	0	0	0
15	???	AS???	100	2	0	0	0	0
16	???	AS???	100	2	0	0	0	0
17	???	AS???	100	2	0	0	0	0
18	???	AS???	100	2	0	0	0	0
19	???	AS???	100	2	0	0	0	0
20	???	AS???	100	2	0	0	0	0
21	ww-in-f121.1e100.net (142.251.167.121)	AS15169	0	2	2	2	2	0.008

Authoritative DNS servers match NS records
All nameservers respond as expected.
All authoritative DNS servers must have the same SOA
SOA records match across NS servers.
Zone should not be transferable via AXFR
AXFR zone transfers are disabled.
Recommended number of NS records
Between 2 and 7 NS records.
GLUE records are correctly configured
NS IPs resolve properly for in-zone NS.
DNSSEC protection
Domain has valid RRSIG DNSSEC record.