AS11188 — LACOUNTY-ISD
AS11188 announces 8 IPv4 prefixes covering 132,354 addresses and 0 IPv6 prefixes.
About this network
LACOUNTY-ISD is the Internal Services Department of the County of Los Angeles — the county's central IT and telecom organisation. It runs the shared network that the county's departments sit behind.
What it's used for
County government networking at genuine scale. RIS observes 49 IPv4 prefixes and roughly 132,352 addresses, anchored on two /16s: 159.83.0.0/16 and 170.208.0.0/16. There is no IPv6 in the observed routing. Only five BGP neighbours are seen, which is the shape of a large end-user network buying transit, not a carrier — the address count is big, the peering is not.
The registrant data confirms the AS is announcing its own county space rather than anyone else's: the two /16s are registered to LANET and LANET-1, and the long tail of /24s deaggregated out of them carries the same handles. One block, 159.225.155.0/24, is registered separately to LADHS-GOV — Los Angeles County's Department of Health Services, an agency inside the same county, which is exactly what you would expect a shared county AS to carry.
Notable
Los Angeles County is the largest county in the United States by population, and the address footprint reflects that: sheriff, health services, courts-adjacent systems, public works and dozens of other departments are all customers of this one network organisation.
Interesting
Almost the whole prefix list is /24s carved out of the two supernets and announced alongside them. That deaggregation is typical of a network stitching many departmental sites together over multiple upstream circuits.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.
Announced prefixes
- 66.127.146.0/24
- 137.164.12.68/31
- 159.83.0.0/16
- 159.225.130.0/24
- 159.225.155.0/24
- 170.208.0.0/16
- 198.51.213.0/24
- 198.51.214.0/24
Upstream networks
- AS19551 Incapsula Inc
- AS20001 Charter Communications Inc
- AS46887 Crown Castle Fiber LLC
- AS7018 AT&T Enterprises, LLC
- AS2152 CENIC
Adjacent networks
awaiting query
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