AS16550

AS16550 is an autonomous system number registered under ARIN to Google LLC (1600 Amphitheatre Parkway, Mountain View, CA), carrying the ASN name GOOGLE-PRIVATE-CLOUD and the org handle GOOGL-2. The defining characteristic of this ASN is its scope: ARIN's registration comments state plainly that "the IP addresses under this Org-ID are in use by Google Cloud customers," and the autnum-level remark adds "this ASN is used for Google Private Cloud." It is not Google's primary network — that is AS15169 — but a narrowly-scoped ASN holding address space allocated to external Google Cloud (GCP) customer workloads. Its peering posture is closed: PeeringDB lists it as "Google Private Cloud" and states it is not possible to peer with AS16550 directly; parties seeking Google connectivity are directed to request peering with AS15169 at peering.google.com. The ASN is active and announced (RIPEstat as-overview reports announced: true), falling within the IANA 16-bit block 16384-17407 assigned by ARIN. Reported originated space is small — IPinfo enumerates five /24 IPv4 prefixes (about 1,280 addresses) and no IPv6 — consistent with a special-purpose customer-IP ASN rather than a backbone. CAIDA ranks it 17520 globally, with a customer cone of 1 ASN, ~8 prefixes, and ~9,984 addresses. The published abuse contact is google-cloud-compliance@google.com, flagged "unvalidated" by ARIN since April 2022. No notable public abuse signal was found as of June 2026: AS16550 does not appear on Spamhaus DROP/ASN-DROP, CleanTalk, FireHOL/IPsum, or in NANOG incident archives, and no BGP hijack or route-leak event is attributed to it — its closed, non-peering posture limits route-leak exposure. The well-known 2018 MainOne BGP leak that affected Google traffic involved AS15169, not AS16550.

Operator

Google LLC (ARIN org handle GOOGL-2; 1600 Amphitheatre Parkway, Mountain View, CA 94043, US) [Confirmed] — ARIN RDAP autnum/16550; peeringdb.com/net/18246

Country / RIR

US, ARIN [Confirmed] — ARIN RDAP autnum/16550; RIPEstat abuse-contact-finder (authoritative_rir: arin)

Allocated

2017-07-31 (ARIN autnum top-level "registration" event, NOT an IEEE date — IEEE publishes no ASN registration dates); "last changed" same date 2017-07-31 [Confirmed] — ARIN RDAP autnum top-level events[]

IANA block

16384-17407 — Assigned by ARIN (IANA 16-bit AS Numbers Registry) [Confirmed] — stat.ripe.net as-overview

Org status

Google LLC, wholly-owned subsidiary of Alphabet Inc., incorporated in the US; AS16550 status "active" per ARIN [Confirmed] — ARIN RDAP autnum/16550, cloud.google.com/about

Contacts

abuse google-cloud-compliance@google.com (GC Abuse desk, GCABU-ARIN, unvalidated since 2022-04-09 per ARIN); tech/admin ZG39-ARIN (arin-contact@google.com) [Confirmed] — ARIN RDAP autnum/16550

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-06-25 — not on Spamhaus DROP/ASN-DROP, CleanTalk, FireHOL/IPsum, or in NANOG archives; no BGP hijack/route-leak attributed to AS16550. General "Google Cloud" phishing/tenant-abuse reports (e.g., Jan 2026 GCP Application Integration campaign) are tenant-abuse patterns scoped to GCP services, not AS16550 routing

Network & routing

Network type

Content (PeeringDB); special-purpose ASN carrying IP space allocated to Google Cloud (GCP) customer workloads; not Google's primary network (that is AS15169) [Confirmed] — peeringdb.com/net/18246, ARIN RDAP registration comments

Size

small/special-purpose — IPinfo enumerates 5 IPv4 /24 prefixes (~1,280 addresses: 137.75.122.0/24, 151.207.24.0/24, 151.207.26.0/24, 185.17.248.0/24, 200.107.8.0/24), 0 IPv6 announced; CAIDA customer cone: 1 ASN, ~8 prefixes, ~9,984 addresses

[Likely] — ipinfo.io/AS16550 (single-source enumeration), CAIDA AS Rank

Routing/peering

announced (RIPEstat as-overview announced: true) [Confirmed]; CLOSED peering — PeeringDB states it is not possible to peer with AS16550; direct Google peering requests go to AS15169 via peering.google.com/iwantpeering; traffic ratio Heavy Outbound

[Confirmed] — stat.ripe.net as-overview, peeringdb.com/net/18246

RPKI

IPinfo notes the announced prefixes carry ROA validation; Google maintains an active RPKI program and publishes ROAs [Likely] — ipinfo.io/AS16550, support.google.com/interconnect/answer/12342476

Notable usage

IP space under this Org-ID is in use by Google Cloud customers (external GCP customer workloads), per ARIN registration comments; abuse routed to google-cloud-compliance@google.com [Confirmed] — ARIN RDAP autnum/16550

Related ASNs

AS15169 (Google's primary ASN; the channel for direct Google peering) [Confirmed] — peeringdb.com/net/18246, peering.google.com

ASN name / handle

GOOGLE-PRIVATE-CLOUD; ARIN autnum handle AS16550 [Confirmed] — ARIN RDAP autnum/16550

Analyst note

Encountered as a small, special-purpose Google ASN. WHOIS resolves to Google LLC; ARIN remarks scope it explicitly to Google Cloud customer IPs. Closed (non-peerable) posture; route Google peering requests to AS15169. CAIDA AS Rank 17520; customer cone 1 ASN, ~8 prefixes, ~9,984 addresses. Clean as of the dated review above.