The ISP Column

2026

Feb	From the Stupid DNS Tricks Department: ipasn.net
Jan	IP Address to Organisation Name Map
Jan	IP Addresses through 2025
Jan	BGP Updates in 2025
Jan	BGP in 2025

2025

Dec	Where are you? A look at GeoIP
Nov	NANOG 95
Nov	A Second Look at Starlink and Geolocation
Nov	How We Measure: IPv6
Nov	Internet Evolution
Oct	Some Notes from RIPE-91
Sep	Geolocation and Starlink (Updated)
Sep	AUSNOG 2025
Sep	Measuring Explicit Congestion Notification
Aug	The Governance of the Root of the DNS
Aug	Congestion Control at IETF 123
Aug	DNS at IETF 123
Jul	IEPG at IETF 123
Jul	Triggering QUIC
Jun	Ossification and the Internet
Jun	A QUIC Progress Report
Jun	A Day in the Life of BGP
May	Resilience in the RPKI
May	Analysis of a Route Leak
Apr	Jevons Paradox and Internet Centrality
Apr	Internet Governance - The End of Multi-Stakeholderism?
Apr	DNS at IETF122
Mar	The Root of the DNS
Feb	Notes from OARC 44
Feb	Network Automation and AI at NANOG 93
Feb	BGP Zombies at NANOG 93
Feb	DNS Nameservers: Service Platforms and Resilience
Jan	IP Addresses in 2024
Jan	BGP Updates in 2024
Jan	BGP in 2024

2024

Dec	DNS Nameservers
Nov	Post-Quantum Cryptography
Nov	DNS OARC 43
Nov	How We Measure: ISP User Counts
Oct	Ethernet at NANOG 92
Oct	The IPv6 Transition
Oct	The Size of Packets
Sep	The Evolution of PON
Sep	Looking for 240/4 Addresses
Jul	Bytes from IETF 120 - A few Routing Topics
Jul	Bytes from IETF 120 - Deep Space IP
Jul	Bytes from IETF 120 - DNS Topics
Jul	Bytes from IETF 120 - BBR 1,2,3
Jul	Privacy and DNS Client Subnet
Jul	Revisiting DNS and Truncation
Jun	DNS Evolution
Jun	Routing Topics at RIPE 88
Jun	DNS Topics at RIPE 88
May	Calling Time on DNSSEC
May	A Transport ProtocolŐs View of Starlink
Apr	IPv6 Prefix Lengths
Apr	DNSSEC and .nz
Apr	Coherent Optical Transceivers
Mar	DNS Topics at IETF 119
Mar	Adding IPv6-only to DNS and Truncation in UDP
Mar	KeyTrap!
Mar	Opinion: Digital Sovereignty and Internet Standards
Feb	DNS and Truncation in UDP
Feb	DNS OARC 42
Feb	DNS and the DELEG Proposal
Jan	IP Addresses through 2023
Jan	BGP in 2023 - BGP Updates
Jan	BGP in 2023 - Have we reached Peak IPv4?

2023

Dec	Models of Trust for the RPKI
Dec	Measurement and Analysis of Protocols at IETF 118
Nov	DNS at IETF 118
Nov	Call the Rouiting Police!
Nov	IPv6, the DNS and Happy Eyeballs
Nov	How We Measure: RPKI ROA Signing and Route Origination Validation
Oct	How We Measure: DNSSEC Validation
Oct	Notes from NANOG 89: Trust and Network Infrastructure
Oct	Notes from NANOG 89: BGP Error Handling
Oct	Internet Governance in 2023
Sep	Notes from OARC 41
Sep	DNS is the new BGP
Sep	Measuring the Use of DNSSEC
Aug	Chips Away
Aug	DNSOP at IETF 117
Aug	IEPG at IETF 117
Jul	On Centrality and Fragmentation
Jul	NXDOMAIN
Jun	Happy 50th Birthday Ethernet!
Jun	A Further Update on IPv6 Extension Headers
Jun	RIPE 86 Bites - Encryption and Active Network Management
Jun	RIPE 86 Bites - Whats the Time?
Jun	RIPE 86 Bites - Gigabits for EU
May	Failed Expectations
May	The Internet as a Public Utility
Apr	The Internet Twenty-Five Years Later
Apr	Notes from IETF116
Mar	Hiding Behind MASQUEs
Mar	Submarine Cable Resilience
Mar	An Economic Perspective on Internet Centrality
Feb	OARC 40
Feb	To DNSSEC or Not?
Feb	The Root Zone of the DNS Revisited
Jan	IP Addresses through 2022
Jan	BGP in 2022 - BGP Updates
Jan	BGP in 2022 - The Routing Table

2022

Dec	Is Secured Routing a Market Failure?
Dec	The DNS at the IGF
Nov	Some Random Notes from IETF 115
Nov	Looking at Centrality in the DNS
Nov	The Fibre Optic Path
Nov	Going Dark
Nov	Comparing QUIC and TCP
Oct	Notes from OARC 39
Oct	IPv6 Extension Headers Revisited
Oct	Walking the Policy Tightrope
Sep	DNS Evolution: Innovation or Fragmentation?
Sep	Fragmentation
Sep	Sender Pays
Sep	A Second Look at QUIC Use
Sep	DoH, DoT and plain old DNS
Aug	Notes from IETF 114
Aug	Bigger, Faster, Better (and Cheaper!)
Aug	Notes from DNS-OARC 38
Jul	A Look at QUIC Use
Jun	Content vs Carriage - Who Pays?
Jun	The Politics of Submarine Cables in the Pacific
May	The Path to Resolverless DNS
May	Are we there yet?
Apr	Using LEOs and GEOs
Apr	Hop by Hop
Apr	AUSNOG'21
Mar	IETF 113 - DNS Topics
Mar	IETF 113 - IEPG
Mar	Revocation
Feb	DNS-OARC 37
Feb	Another Year of the Transition to IPv6
Feb	DNS4EU
Feb	What's an "Address"?"
Jan	IP Addressing through 2021
Jan	BGP in 2021 - BGP Updates
Jan	BGP in 2021 - The BGP Table

2021

Dec	ICANN DNS Resolver Symposium
Dec	IPv4 Address Markets
Dec	DNS-OARC 36
Dec	Some Notes from RIPE 83
Nov	DINR 2021 Workshop Report
Nov	IETF 112
Nov	DNS at IETF 112
Nov	NANOG 83
Nov	RSA vs ECDSA in DNSSEC
Oct	On DNS Openness
Oct	Fifty Years On
Oct	DNSSEC with RSA-4096 Keys
Oct	Learning from Facebook's Mistakes
Sep	IAB Workshop on Measuring Network Quality for End Users
Sep	Regulating Big Tech. This Time, for sure!
Sep	Another DNS OARC Meeting
Aug	TLS with a side of DANE
Aug	Running Code
Aug	Some not-DNS Topics at IETF 111
Aug	DNS at IETF 111
Jul	Outage Reporting
Jul	Another Portent of the Decline and Fall of the Telco
Jul	A Survey on Securing Inter-Domain Routing: Part 1 - BGP: Design, Threats and Security Requirements
	Part 2 - Approaches to Securing BGP
Jul	CDNs and Centrality
Jun	DNSSEC with EdDSA
Jun	Internet Centrality
May	DNS OARC 35
May	Transport vs Network
Apr	IPv4 in the Headlines
Apr	IPv6 Fragmentation Loss
Mar	DNS at IETF 110
Mar	TCP Congestion Control at IETF 110
Mar	Measuring ROAs and ROV
Mar	Notes from the DNS Privacy Workshop at NDSS 2021
Feb	Notes from NANOG 81
Feb	DNS OARC 34
Feb	An IPv6 Update for 2020
Feb	The Internet of Trash
Jan	Addressing 2020
Jan	BGP in 2020 - BGP Update Churn
Jan	BGP in 2020 - The BGP Table

2020

Dec	DNS Oblivion
Dec	DNS Flag Day 2020
Dec	DNS 2XL
Nov	DNS XL
Nov	IETF 109
Oct	DNS Trends
Oct	Securing Routing Q&A's
Oct	Going Postal
Sep	Scaling the Root of the DNS
Sep	DNS Query Privacy Revisited
Aug	The Making of an RFC in today's IETF
Aug	DNS OARC Meeting Notes
Aug	On Cyber Governance
Jul	IPv6 and the DNS
Jun	Measuring Route Origin Validation
Jun	Measuring IPv6
Jun	Where is the DNS Heading?
Jun	Technology Adoption in the Internet
Jun	DNS OARC 32a Meeting Report
Jun	A DNS view of Lockdown
May	New IP and Emerging Communications Technologies
Apr	RPKI and Trust Anchors
Apr	The Wrong Certificate
Mar	Insecurity
Mar	Revocation
Feb	DNSSEC Validation (Revisited)
Feb	Deep Sea Diving
Jan	Addressing 2019
Jan	BGP in 2019 (Part 2)
Jan	BGP in 2019 (Part 1)

2019

Dec	Sizing the Buffer
Nov	My IETF 106
Nov	Notes from OARC 31
Nov	DNS Wars
Oct	Path Prepending in BGP
Oct	Dark Traffic
Sep	DNS Resolver Centrality
Sep	Why is Securing BGP just so Damn Hard?
Aug	DNS Query Privacy
Jul	TCP MSS Values
Jul	Not So Private Thoughts at IETF 105
Jun	Looking for Whats Not There
Jun	Network Protocols and their Use
Jun	Happy Birthday BGP
May	Meeting Report: DNS OARC 30
May	Meeting Report: ICANN DNS Symposium
Apr	Expanding the DNS Root
Apr	More DOH
Apr	DNS Privacy at IETF 104
Mar	The State of DNSSEC Validation
Mar	A quick look at QUIC
Feb	No!
Jan	Addressing 2018
Jan	BGP in 2018 - Part2: BGP Churn
Jan	BGP in 2018 - Part1: The BGP Table

2018

Dec	IPv6 in China
Dec	Internet Economics
Nov	What's the Time
Nov	Analyzing the KSK Roll
Nov	Has Internet Governance become Irrelevant?
Oct	Diving into the DNS
Oct	Securing the Routing System at NANOG 74
Oct	DOH!
Sep	Measuring the KSK Roll
Aug	The Law of Snooping
Aug	DNSSEC and DNS over TLS
Aug	Measuring ECDSA in DNSSEC - A Final Report
Jul	An Update on Securing BGP from IETF 102
Jul	The Uncertainty of Measuring the DNS
Jun	Another 10 Years Later
May	What Drives IPv6 Deployment?
Apr	Measuring ATR
Apr	Measuring Root Zone KSK Trust
Apr	Stuffing the Camel into the Bikeshed
Mar	Just One Bit
Mar	DNS OARC 28
Mar	Crypto Zealots
Feb	Peak DNSSEC?
Jan	Addressing 2017
Jan	BGP in 2017

2017

Dec	A Workshop on Internet Economics
Dec	Network Neutrality - Again
Nov	Helping Resolvers to help the DNS
Nov	Hiding the DNS
Nov	DNS and DDOS
Nov	Thanks Google!
Nov	RIPE 75
Oct	Raw Sockets in IPv6
Oct	DNS OARC 27
Oct	Not Rolling the KSK
Sep	An Opinion in Defence of NATs
Aug	IPv6 Fragmentation Extension Headers, Part 2
Aug	IPv6, Large UDP Packets and the DNS
Jul	Notes from IETF 99 - The Other Bits
Jul	Notes from IETF 99 - DNS Activity

Jul

Notes from IETF 99 - The IEPG

Jun	More Specifics in BGP
May	DNS OARC 26
May	RIPE 74
May	BBR TCP
Apr	Up!
Apr	ARIN 39 Report
Apr	IETF 98 Report
Mar	The Internet's Gilded Age
Feb	The Root of the DNS
Feb	NANOG 69
Jan	Addressing 2016
Jan	BGP in 2016
Jan	A Postscript to the Leap Second

2016

Dec	Let's Encrypt with DANE
Dec	Leaving it to the Last Second
Dec	Scoring the DNS Root Server System, Pt2 - A Sixth Star?
Nov	Scoring the DNS Root Server System
Nov	RIPE 73
Nov	BGP Large Communities
Oct	The Death of Transit?
Oct	DNS DDOS
Oct	NANOG 68
Oct	A Brief History of the IANA
Oct	DNS OARC 25
Oct	IPv6 and the DNS
Oct	DNSSEC and ECDSA
Sep	DDOS Attackers - Who and Why?
Sep	Binding to an IPv6 Subnet
Aug	IPv6 Performance - Revisited
Jul	IETF 96
Jul	Hosts vs Networks
Jul	One Second Warning
Jun	What is Google Up To?
Jun	Open Season
Jun	DNS Privacy
May	Fragmenting IPv6
Apr	Declaring IPv6 an Internet Standard
Apr	IPv6 and the Internet of Things
Apr	Declaring IPv4 "Historic"
Apr	DNS OARC 24
Mar	Rolling Roots
Mar	DNS Zombies
Feb	NANOG 66
Feb	On the Internet Everyone is Connected to Everyone Else - Right? (Full Report)
Jan	BGP in 2015
Jan	Fragmentation
Jan	Addressing 2015

2015

Nov	What's in a Name?
Nov	RIPE 71 Meeting Report
Nov	IPv6 Performance
Oct	Transport Protocols
Oct	NANOG 65 Report
Oct	DNS OARC Fall 2015 Workshop Report
Oct	Some Thoughts on the Open Internet
Sep	Measuring the Root Zone KSK Keyroll
Sep	The Changing Mobile World

Aug	The Global Village Idiot
Aug	A Second Look at APNIC and IPv4 Address Exhaustion
Aug	IPv4 Address Transfers in APNIC
Aug	IPv4 Address Exhaustion in APNIC
Jul	Revisiting Apple and IPv6
Jul	Changes to the Way We Measure IPv6
Jun	More Leaky Routes
Jun	An Update on IPv6

Jun	Apple and IPv6
Jun	Multipath TCP
Jun	NANOG 64
May	Tech Note: Measuring DNS Behaviour
May	Diving into the DNS
Apr	The Internet of Stupid Things
Mar	The Mobile Internet
Feb	Notes from NANOG 63
Feb	Decision Time for the Open Internet
Jan	Addressing 2014
Jan	BGP in 2014

2014

Dec	Workshop on Future Root Service
Nov	The Resolvers We Use
Nov	Who's Watching
Oct	ECDSA and DNSSEC
Oct	NANOG 62
Oct	Privacy and Security - Five Objectives
Oct	Internet Regulation: Section 706 vs Title II
Oct	How Big is That Network?
Sep	What's so special about 512?
Aug	What's the cost of DNSSEC
Aug	Where is Metadata Anyway?
Aug	What is Metadata and Why Should I Care?
Jul	Some Internet Measurements
Jun	The Open Internet?
May	NANOG 61
Apr	RIP Network Neutrality
Apr	A Reappraisal of Validation in the RPKI
Mar	NTP and Evil
Mar	Protocol Basics - The Network Time Protocol
Feb	BGP in 2013 - The Churn Report
Feb	Addressing 2013
Jan	BGP in 2013

2013

Dec	MITM and Routing Security
Dec	IPv6 at the OECD - A Public Policy Perspective on IPv6
Nov	Who Uses Google's DNS?
Nov	IP Addresses and Traceback
Oct	Dotless
Oct	The Big Bad Internet
Sep	Valuing IP Addresses
Sep	Not All IP Addresses are the Same
Sep	A Question of DNS Protocols
Aug	When?
Jul	DNS, DNSSEC and Google's Public DNS Service
Jul	Here's looking at you ...
Jun	A Year in the Life
Jun	The Company You Keep
May	APNIC Labs IPv6 Measurement System
May	A Royal Opinion on Carrier Grade NATs
May	But That's Impossible
May	Measuring DNSSEC Performance
Apr	A Primer on IPv4, IPv6 and Transition
Apr	What the Ftt?
Apr	DNSSEC and Google's Public DNS Service
Mar	Literally IPv6
Feb	"Multi-Stakeholderism" and the Internet Policy Debate
Jan	Addressing 2012 - Another One bites the Dust!

2012

Dec	Calling Stumps at WCIT: Win, Lose or Draw?
Dec	To Flat or to Cap?
Nov	Superstorm Sandy and the Global Internet
Nov	Counting IPv6 in the DNS
Nov	NANOG 56
Oct	Re-Counting DNSSEC
Oct	NORDUnet 2012 - My Impressions
Oct	Counting DNSSEC
Sep	Network Service Models and the Internet
Aug	The End, Part 2
Aug	Leaping Seconds
Jul	Carriage vs Content
Jul	All Your Packets Belong to Us
Jul	Measuring IPv6 - Country by Country
Jul	Occam's ITRs
Jun	The QoS Emperor's Wardrobe
Jun	A report on the OECD/BEREC Workshop on Interconnection and Regulation
May	Bemused Eyeballs
Apr	A Quick Primer on Internet Peering and Settlements
Apr	It's just not Cricket: Number Misuse, WCIT and ITRs
Mar	Leaking Routes
Feb	Detecting Bogon Filters
Jan	Addressing 2011 - One Down, Four to Go!

2011

Dec	The Curious Case of the Crooked TCP Handshake
Dec	Dual Stack Esotropia
Nov	The (BGP) World is Flat!
Nov	BGP Growth Revisited
Oct	Hacking Away at the Internet's Security
Sep	Transitional Uncertainties
Aug	Networking @ Home
Jul	The Future of the Internet Economy: Chapter 2
Jul	Securing BGP with BGPsec
Jun	Still RIPE @ 62
May	Testing IPv6 for World IPv6 Day
Apr	Testing Teredo
Mar	Transitioning Protocols - Part 2
Feb	Transitioning Protocols - Part 1
Jan	Addressing 2010

2010

Dec	Flailing IPv6
Nov	Transitional Myths
Oct	When?
Sep	A Rough Guide to Address Exhaustion
Aug	Wired vs Wireless
Jul	Background Radiation in IPv6
Jun	DNSSEC- A Review
May	Two simple Hints for Dual Stack Servers
Apr	Measuring More IPv6
Mar	Traffic in Network 1.0.0.0/8
Feb	Roll Over and Die?
Jan	Addressing 2009

2009

Dec	NXDOMAIN?
Nov	Stateless and DNSperate!
Oct	RIPE at 59!
Sep	Is the Transition to IPv6 a "Market Failure?"
Aug	AS Numbers - Again
Jul	The State of SIDR
Jun	Twenty Years Later
May	Predicting the End of the World
Apr	NAT++: Address Sharing in IPv4
Mar	BGP in 2008
Feb	Mutterings on MTUs
Jan	A Tale of Two Protocols:IPv4, IPv6, MTUs and Fragmentation

2008

Dec	Resource Certificates
Nov	Address Transfers and Markets
Oct	Confronting IPv4 Address Exhaustion
Sep	IPv6 Transition at IETF72
Aug	What IPv6 Address is That?
Jul	The Future of the Internet - A Political View
Jun	10 Years Later
May	The End of End to End?
Apr	IPv6 Deployment: Just where are we?
Mar	Tubular Routing
Feb	IPv6 Transition Tools and Tui
Jan	DNSSEC - Once More, With Feeling!

2007

Dec	On the Hunt for Critical Internet Resources
Nov	NANOGGING
Oct	IPv6 Local Addresses
Sep	Trust
Aug	Transition to IPv6
Jul	The End of the (IPv4) World
Jun	Damping BGP
May	IPv6 Ping Pong
Apr	More ROAP – Routing and Addressing at IETF68
Mar	infrastructure ENUM
Feb	Addressing the Future Internet
Jan	32-bit AS Numbers – The View from the old BGP World

2006

Dec	Internationalizing the Internet
Nov	Whither Routing?
Oct	DNSSEC - The Opinion
Sep	DNSSEC - The Practice
Aug	DNSSEC - The Theory
Jul	Book Review - Wireless Networking for the Developing World
Jun	The BGP Report for 2005
May	An Introduction to BGP - The Protocol
Apr	The Genesis of an Interent Standard
Mar	Net Neutrality - Just who owes who in the content economy?
Feb	Convergence?
Jan	IPv6 - Extinction, Evolution or Revolution?

2005

Dec	Routing IETF-64
Nov	Numerology
Oct	A Little Carrier Nostalgia
Sep	Public Policy Questions for Internet Governance
Aug	Exploring AS Numbers
Jul	Just How big is IPv6?
Jun	Faster
May	Public Address Policies
Apr	Competitive Addressing
Mar	Securing Inter-Domain Routing
Feb	Securing Routing - An ISP's Perspective
Jan	Where's the Money?

2004

Dec	IP Adressing Schemes
Nov	Internet Governance (Part 2)
Oct	Internet Governance (Part 1)
Sep	BGP Wedgies
Aug	Evolving TCP
Jul	TCP - How it works
Jun	Multi-homing and Identity in IPv6
May	Multi-homing
Apr	Hunting the Bogon
Mar	The State of Inter-Domain Routing
Feb	Allocations vs Announcements
Jan	It's Latency

2003

Dec	That Was the Year That Was
Nov	Blurring the Lines
Oct	On the Trashing of the Commons
Sept	Why are NATS so popular
Aug	IPv4 - How long have we got?
Jul	ENUM
Jun	Who are you? A survey of Digital Identities
May	Happy Birthday Ethernet!
Apr	Trust - Revisited
Mar	Should the Network know what we're up to?
Feb	Just how good are you?
Jan	Waiting for IPv6

2002

Dec	Won't Get Dot Fooled Again
Jun	Lord of the Numbers
May	SNMP - What's Next?
Apr	SNMP - Friend or Foe?
Mar	Searching for the Midas bits
Feb	The Wireless Internet
Jan	The ISP - An Uncommon Carrier

2001

Dec	It's a Trust Thing
Nov	The Trouble with DSL
Oct	MPLS - Is the Emperor Clothed?
Sep	Best Efforts Networking
Aug	An IP Scorecard
Jul	Identity in IP
Jun	Where is the Content Economy?
May	The Unreliable Internet
Apr	The Middleware Dilemma
May	Scaling the Internet - The Routing View
Feb	An Introduction to IP Routing
Jan	To NAT or IPv6 - That is the Question

2000

Dec	IP Addresses
Nov	Peering
Oct	What does the Customer Really Want?
Sep	It's all Latency
Mar	Simplex made Simple