AS20144 — IMRS

AS20144 announces 6 IPv4 prefixes covering 2,304 addresses and 6 IPv6 prefixes.

About this network

IMRS is the Internet Management and Routing Services AS operated by ICANN.

What it's used for

• The space carries ICANN's core Internet infrastructure, specifically its DNS root server operations and engineering systems, as evidenced by netnames ICANN-DNS-ENGINEERING and ICANN-DNS-SERVERS.
• With 2304 IPv4 addresses and 6 IPv6 prefixes announced against 108 observed neighbours, the high neighbour-to-address ratio indicates a transit-heavy role for this small, specialized infrastructure block.

Notable

• Registrants are consistent with the announcer, with ICANN listed for five of the six largest prefixes and American Registry for Internet Numbers for the NET199 block.
• The address inventory is finely subdivided into six distinct IPv4 prefixes, reflecting the segmented nature of ICANN's internal corporate estate for its critical Internet functions.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 192.0.37.0/24
• 192.0.38.0/24
• 192.0.40.0/23
• 199.7.82.0/23
• 199.7.94.0/23
• 199.43.132.0/24
• 2001:500:3::/48
• 2001:500:8c::/48
• 2001:500:9c::/46
• 2602:800:9004::/47
• 2620:0:22b0::/48
• 2620:0:2ee0::/48

Upstream networks

• AS6939 Hurricane Electric LLC
• AS1299 Arelion Sweden AB
• AS8452 IDDQD-AS
• AS33544 WiLine Networks Inc.
• AS37100 SEACOM Limited
• AS2914 NTT America, Inc.
• AS31713 Gateway Communications
• AS3257 GTT Communications Inc.
• AS3491 PCCW Global (HK) Ltd.
• AS21497 PrJSC "VF UKRAINE"
• AS37721 Virtual Technologies & Solutions
• AS24482 SG.GS
• AS8522 Foundation of Research and Technology Hellas
• AS2495 Kansas Research and Education Network
• AS29504 Freenet Liberec, z.s.
• AS38001 NewMedia Express Pte Ltd
• AS12731 IPHH Internet Port Hamburg GmbH
• AS18200 Office des Postes et Telecommunications New-Caledonia
• AS15954 Tecnocratica Centro de Datos, S.L.
• AS23951 PT JEMBATAN CITRA NUSANTARA
• AS38229 Lanka Education & Research Network, NREN
• AS10084 Internet Association of Australia Content Network
• AS19653 CTS Communications Corp
• AS31287 IPACCT CABLE Ltd
• AS7575 Australian Academic and Research Network (AARNet)

Adjacent networks

• AS6939 Hurricane Electric LLC
• AS1299 Arelion Sweden AB
• AS8452 IDDQD-AS
• AS33544 WiLine Networks Inc.
• AS37100 SEACOM Limited
• AS2914 NTT America, Inc.
• AS31713 Gateway Communications
• AS3257 GTT Communications Inc.
• AS3491 PCCW Global (HK) Ltd.
• AS21497 PrJSC "VF UKRAINE"
• AS37721 Virtual Technologies & Solutions
• AS24482 SG.GS
• AS8522 Foundation of Research and Technology Hellas
• AS2495 Kansas Research and Education Network
• AS38001 NewMedia Express Pte Ltd
• AS29504 Freenet Liberec, z.s.
• AS12731 IPHH Internet Port Hamburg GmbH
• AS18200 Office des Postes et Telecommunications New-Caledonia
• AS38229 Lanka Education & Research Network, NREN
• AS15954 Tecnocratica Centro de Datos, S.L.
• AS23951 PT JEMBATAN CITRA NUSANTARA
• AS10084 Internet Association of Australia Content Network
• AS19653 CTS Communications Corp
• AS7575 Australian Academic and Research Network (AARNet)
• AS6697 Republican Unitary Telecommunication Enterprise Beltelecom

Internet exchanges

• IX.br (PTT.br) São Paulo — São Paulo, Brazil
• IX.br (PTT.br) Fortaleza — Fortaleza, Brazil
• Equinix Internet Exchange Singapore — Singapore, Singapore
• IX.br (PTT.br) Porto Alegre — Porto Alegre, Brazil
• IX.br (PTT.br) Brasília — Brasília, Brazil
• IX.br (PTT.br) Curitiba — Curitiba, Brazil
• Equinix Internet Exchange Paris — Paris, France
• NIX.CZ - Neutral Internet eXchange for the Czech Republic — Prague, Czech Republic
• IX.br (PTT.br) Salvador — Salvador, Brazil
• Kenya Internet Exchange Point - Nairobi — Nairobi, Kenya
• IX.br (PTT.br) Florianópolis — Florianópolis, Brazil
• IX.br (PTT.br) Belo Horizonte — Belo Horizonte, Brazil
• IX.br (PTT.br) Belém — Belém, Brazil
• IX.br (PTT.br) Natal — Natal, Brazil
• IX.br (PTT.br) Campinas — Campinas, Brazil
• IX.br (PTT.br) Londrina — Londrina, Brazil
• Serbian Open Exchange — Belgrade, Serbia