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AS72

AS72 is Schlumberger Limited.

Last updated 3 Nov 2026 from DB-IP ASN Lite (2026-11-01) and RIR statistics (2 Nov 2026)

Short answer

AS72 belongs to Schlumberger Limited. DB-IP Lite attributes 1,151,744 IPv4 addresses in 36 ranges and no IPv6 ranges to it, 48% of the IPv4 space in United States. The number is registered with ARIN in United States on 5 May 1986.

Facts for AS72
Operator (DB-IP)Schlumberger Limited
IPv4 addresses1,151,744
IPv4 ranges36
IPv6 ranges0
RegistryARIN
Registered5 May 1986
Registry countryUnited States (US)

Does it publish a geofeed?

We haven’t checked this network’s registry records for a geofeed yet. The Truth Check looks for one live for any address you test.

Shared addresses (CGNAT)

Schlumberger Limited hasn’t been documented as using carrier-grade NAT in a source we could check. To see whether your own connection is behind it, compare your router’s address on the CGNAT check.

IPv6

DB-IP lists no IPv6 ranges for AS72, so its customers reach websites over IPv4.

Where its IPv4 space is used, according to DB-IP

US48%
NL46%
SG6%
GB0.24%
RU0.11%
SE0.09%
IN0.04%
FR0.04%

Share of the network’s IPv4 addresses by DB-IP Country Lite. IP Geolocation by DB-IP.

IP ranges

RangeAs CIDRAddresses
128.58.0.0 – 128.58.255.255128.58.0.0/1665,536
129.87.0.0 – 129.87.255.255129.87.0.0/1665,536
134.32.0.0 – 134.32.255.255134.32.0.0/1665,536
136.249.0.0 – 136.254.255.255136.249.0.0/16, 136.250.0.0/15 …393,216
137.144.0.0 – 137.144.255.255137.144.0.0/1665,536
163.183.0.0 – 163.185.248.255163.183.0.0/16, 163.184.0.0/16 …194,816
163.185.250.0 – 163.188.255.255163.185.250.0/23, 163.185.252.0/22 …198,144
192.12.34.0 – 192.12.35.255192.12.34.0/23512
192.12.40.0 – 192.12.40.255192.12.40.0/24256
192.12.43.0 – 192.12.43.255192.12.43.0/24256
192.23.0.0 – 192.23.6.255192.23.0.0/22, 192.23.4.0/23 …1,792
192.23.8.0 – 192.23.12.255192.23.8.0/22, 192.23.12.0/241,280
192.23.14.0 – 192.23.17.255192.23.14.0/23, 192.23.16.0/231,024
192.23.19.0 – 192.23.61.255192.23.19.0/24, 192.23.20.0/22 …11,008
192.23.63.0 – 192.23.63.255192.23.63.0/24256
192.23.65.0 – 192.23.69.255192.23.65.0/24, 192.23.66.0/23 …1,280
192.23.71.0 – 192.23.123.255192.23.71.0/24, 192.23.72.0/21 …13,568
192.23.127.0 – 192.23.145.255192.23.127.0/24, 192.23.128.0/20 …4,864
192.23.147.0 – 192.23.156.255192.23.147.0/24, 192.23.148.0/22 …2,560
192.23.158.0 – 192.23.164.255192.23.158.0/23, 192.23.160.0/22 …1,792
192.23.166.0 – 192.23.184.255192.23.166.0/23, 192.23.168.0/21 …4,864
192.23.186.0 – 192.23.186.255192.23.186.0/24256
192.23.188.0 – 192.23.255.255192.23.188.0/22, 192.23.192.0/1817,408
192.31.32.0 – 192.31.32.255192.31.32.0/24256
192.31.36.0 – 192.31.36.255192.31.36.0/24256
192.58.37.0 – 192.58.39.255192.58.37.0/24, 192.58.38.0/23768
195.19.192.0 – 195.19.192.255195.19.192.0/24256
198.136.232.0 – 198.136.232.255198.136.232.0/24256
198.160.175.0 – 198.160.176.255198.160.175.0/24, 198.160.176.0/24512
198.176.175.0 – 198.176.175.255198.176.175.0/24256
199.6.128.0 – 199.6.255.255199.6.128.0/1732,768
199.168.0.0 – 199.168.9.255199.168.0.0/21, 199.168.8.0/232,560
204.17.157.0 – 204.17.162.255204.17.157.0/24, 204.17.158.0/23 …1,536
204.126.126.0 – 204.126.127.255204.126.126.0/23512
212.192.205.0 – 212.192.205.255212.192.205.0/24256
212.193.96.0 – 212.193.96.255212.193.96.0/24256
Showing 36 of 36 IPv4 and 0 of 0 IPv6 ranges All ranges (CSV)

IP Geolocation by DB-IP, ASN Lite, CC BY 4.0.

Using an address from this network? See which sources agree on where it is.

Sources

  1. DB-IP IP to ASN Lite (CC BY 4.0) · checked 3 Nov 2026
  2. NRO RIR delegated-extended statistics · checked 3 Nov 2026