whay OS u are using?

you can use host or dig commands in linux

or nslookup in windows

Is this a DNS table?

is a part of a DNS table

but is enough

75.149.56.250 is a new IP?

use whois service

no my ip 74.208.174.165

dig allwingo.com ns

; <<>> DiG 9.11.13-RedHat-9.11.13-3.fc31 <<>> allwingo.com ns
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 64110
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 5

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;allwingo.com.                  IN      NS

;; ANSWER SECTION:
allwingo.com.           3600    IN      NS      ns28.domaincontrol.com.
allwingo.com.           3600    IN      NS      ns27.domaincontrol.com.

dig allwingo.com @ns27.domaincontrol.com.

; <<>> DiG 9.11.13-RedHat-9.11.13-3.fc31 <<>> allwingo.com @ns27.domaincontrol.com.
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 9216
;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 1
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1472
;; QUESTION SECTION:
;allwingo.com.                  IN      A

;; ANSWER SECTION:
allwingo.com.           3600    IN      A       75.149.56.250

problem not in a dns ttl i think

dns zone is not changed

So delegation is not done or not completed?

not done

you can see answer from a authoritative dns-server

In general, beauty ...

and you can see old IP address in this answer

Большое спасибо за помощь. Вы помогли мне очень сильно и благодаря вам я пораньше уйду с работы.

you are welcome) lol)