No — smtp.nyp.org is IPv4 only.

Has an IPv4 address but no IPv6 (AAAA) record. IPv6-only visitors can't reach it directly.

This is a saved measurement from 2026-11-15 17:31 UTC. Check smtp.nyp.org live now

D
IPv6 readiness
The website has no IPv6.
Website over IPv6
smtp.nyp.org has no AAAA record.		no
Mail servers (MX) have IPv6
No MX records, so mail goes to the domain's own address (implicit MX). It has no AAAA record.		no
Nameservers have IPv6
No nameserver has an AAAA record — an IPv6-only resolver can't reach this domain's DNS.
lex-iblxext1.med.cornell.edu ✗york-iblxext1.med.cornell.edu ✗ns1.nyp.org ✗ns2.nyp.org ✗
no

What's keeping smtp.nyp.org from an A

  1. smtp.nyp.org is an alias of smtp.vadce.nyp.org, which has no IPv6
    smtp.nyp.org is a CNAME, so it can't also have its own AAAA record. Ask whoever runs smtp.vadce.nyp.org to enable IPv6 there — or replace the alias with the A and AAAA records they give you. Why some hosts don't offer IPv6
  2. Mail servers without IPv6
    Your domain's mail goes to its own address, which has no AAAA record.
  3. Nameservers without IPv6
    lex-iblxext1.med.cornell.edu, york-iblxext1.med.cornell.edu, ns1.nyp.org, ns2.nyp.org all have no AAAA record, so a resolver that only speaks IPv6 can't look your domain up. Most DNS providers offer IPv6 nameservers; ask yours, or move DNS to one that does.

Check again

smtp.nyp.org  IPv4 only

Alias ofsmtp.vadce.nyp.org
A (IPv4)148.163.157.105
AAAA (IPv6)none

What this means

Visitors on IPv6-only networks (many mobile carriers) can still reach it, but only through a translator their carrier runs (NAT64). The site itself has no IPv6 address — and you can't make one up from the IPv4. Why some hosts don't offer it

Copy the evidence — a citation-ready record of this measurement

 Permanent link: aaaa.bot/r/-7BbFPdbir · How we measure

Checked 2026-11-15 17:31:14 UTC. Full DNS report: dns.pizza/domain/smtp.nyp.org · Age, certificate and blocklists: how.is/smtp.nyp.org · JSON: /api/v1/smtp.nyp.org