AS704

AS704 is a dormant legacy autonomous system registered to Verizon Business (the former MCI/UUNET) that currently announces zero IPv4 and zero IPv6 prefixes, with no visible BGP peers, upstreams, or downstream customers in the global routing table today.

The registry record for AS704 is a block object spanning AS701 through AS705 under ARIN handle AS701, name "UUNET." That block's top-level registration event dates to 1990-08-03, with a last-changed event of 2022-05-31; both dates are corroborated independently by bgp.tools, which states the ASN was "registered to Verizon Business on August 3, 1990."

Routing data from RIPEstat, CAIDA ASRank, bgp.he.net, and bgp.tools agree AS704 is unannounced: CAIDA ASRank #79459 with zero customer-cone prefixes and addresses, and zero of 324 IPv4 / zero of 321 IPv6 RIS peers observing it. A single historical prefix, 63.73.191.0/24, was seen announced from 2000 to 2003; nothing has been announced since.

Verizon's published interconnection/peering policy names only AS701, AS702, and AS703 as its covered regional networks — AS704 is absent from that document, and it has no PeeringDB network record, consistent with a retained-but-unused ASN inside the legacy UUNET numbering block rather than an independently operated network.

Country / RIR

US, ARIN [Confirmed] — https://rdap.arin.net/registry/autnum/704

Allocated

1990-08-03 (ARIN RDAP top-level autnum registration event for the AS701-AS705 block record that contains AS704) [Confirmed, corroborated by two independent angles] — https://rdap.arin.net/registry/autnum/704, https://bgp.tools/as/704

IANA reference

none — blank, no RFC to cite [Unknown]

Abuse contacts

abuse@verizon.com, abuse-mail@verizonbusiness.com

Security/abuse context

no notable public abuse signal found for AS704 itself as of 2026-07-24; historical UUNET spam notoriety belongs to sibling AS701, not AS704

Network & routing

Network type

legacy member of the UUNET/Verizon Business AS701-AS705 block; currently unannounced/dormant rather than an actively operated distinct network [Confirmed] — https://rdap.arin.net/registry/autnum/704, https://bgp.he.net/AS704

Routing status

registry status "active," but 0 announced IPv4/IPv6 prefixes, 0 BGP peers, 0 upstreams, 0 customers; CAIDA ASRank #79459, seen=false, cliqueMember=false [Confirmed] — https://api.asrank.caida.org/v2/restful/asns/704, https://stat.ripe.net/data/routing-status/data.json?resource=704, https://bgp.he.net/AS704, https://bgp.tools/as/704

Peering

no PeeringDB record for AS704; Verizon's official interconnection policy names only AS701/AS702/AS703, omitting AS704 [Confirmed] — https://www.verizon.com/business/terms/peering/

RPKI

not assessable — no announced prefixes, so no ROAs to validate [Unknown/not applicable] — https://stat.ripe.net/data/rpki-validation/data.json?resource=704

Related ASNs

AS701 (UUNET/Verizon Business proper, active), AS702, AS703, AS705 — same registry block [Confirmed] — https://rdap.arin.net/registry/autnum/704

ASN

AS704 [Confirmed] — https://rdap.arin.net/registry/autnum/704

Registry name / operator

"UUNET" registry short name; registrant Verizon Business (org handle MCICS, formerly MCI Communications Services, Inc.) [Confirmed] — https://rdap.arin.net/registry/autnum/704

Last changed

2022-05-31 (ARIN RDAP top-level last-changed event) [Confirmed] — https://rdap.arin.net/registry/autnum/704

Historical announcement

63.73.191.0/24 seen 2000-08-25 through 2003-02-28; none since [Confirmed] — https://stat.ripe.net/data/announced-prefixes/data.json?resource=704

Analyst note

dormant legacy ASN inside the Verizon/UUNET AS701-AS705 block; live operational traffic runs under sibling ASNs, not AS704.